This includes checking the tires for proper inflation as well as inspecting hoses, belts and other parts for signs of wear or damage. Misfire on cylender 2.. Ostensibly, this means that Ford will repair or replace faulty engines or transmissions within 5 years or 60,000 miles. Really pathetic, not even hitting the min 23 mark. I will definitely try and get his help with some other stuff I need done in the future! You want to experience everything your vehicle has to offer, which is why you love pushing hard on the accelerator and feeling the power the engine has. Have been keeping track of how much gas this bugger is using, and it seems pretty off. Diesel fuel is a type of liquid fuel that is commonly used in diesel engines, while ultra low sulfur diesel (ULSD) is a special type of diesel fuel with reduced sulfur content. Coquitlam, Britsh Columbia, canada. Use your cruise - set it to 55 or 60 mph on your way home - reset your fuel economy - see what you might get straight highway home. Get notified about new defects, investigations, recalls & lawsuits for the. I have heard that Ford has 3 other 2013 models where they were giving money back for misrepresenting the mileage (ex. This is my first Ford product purchased in all the years of driving and it will be my last. Official fuel economy ratings for city driving were: Kia: 24 mpg Will never buy another ford unless they are willing to make up for all the extra I have had to spend on gasoline for this problem car. I would definitely book Berchel again! Very friendly. Ford I have tried multiple driving styles in an attempt to reach the rated fuel mileage, ( from old granny style, to more aggressive accelerate to speed and cruise), currently I just try to keep the rpms below 3000 while city driving. You can keep the car in a garage to keep it warmed up or you might decide to go south for the winter. This can lead to a drop in fuel efficiency as well as slow acceleration and the car not having enough power. it's great, comfortable, but there are issues with the auto start. I have a ford escape that is only getting 13 MPG aroung town and 16-17 mpg on the highway. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. With the 2.0L 4 cylinder EcoBoost engine, you can get 21 miles per gallon in the city and 29 on the highway. RELATED: 8 Best Catalytic Converter Cleaners. Instead, in a somewhat unprecedented move, Ford sent tow trucks to pick up the affected vehicles and handed out rental cars while the owners waited for repairs. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. Fuel Saving Tip #4: Change Your Spark Plugs I have had two Escapes recently a 2014 and a 2017. Real customer reviews from It may be necessary for the mechanic to test drive the car to produce acceptable results and pinpoint the source of the problem. I rather curtly replied that I was well versed in easing a vehile to speed, I then asked if the mechanic assumed that I was using my baby seats as positional weights so I could take corners at 80km/h. 2017 Ford Escape poor gas mileage. Once a week I drive on the highway to CarGurus has 41,015 nationwide Escape listings starting at $1,000. Sadly, theres not a whole lot you can do about this problem. The fuel system stores and supplies fuel to the car to help drive the engine. Instead, it will go back to your gas tank, making it difficult to refuel your tank. This could be caused by a variety of reasons, such as faulty spark plugs, loose exhaust system components, worn out fuel injectors, or a vacuum leak. It tells me my driving is good! Regular maintenance such as oil changes and air filter replacements are essential for ensuring proper performance and fuel efficiency. Front vehicle photos 1986-2018 Autodata, Inc. dba Chrome Data. Only getting average mileage of 15.7 MPG. The fuel pump pulls fuel from the gas tank to the fuel injectors. An unbalanced air-fuel ratio during combustion can lead to improper combustion due to a high amount of air in the engine. This process is termed purging, which needs to be assisted by the purge valve. One possible reason your ford escape is getting bad gas mileage is because you could have a clogged fuel filter. Osuagwu Solomon is a certified mechanic with over a decade of experience in the mechanic garage, and he has over five years of experience in the writing industry. Link must be about this specific problem or it will be deleted it must be free & helpful, like a video or web page or forum thread about this exact problem. Q: What Should I Do if My Ford Escape is Experiencing Poor Gas Mileage? The issue seems to be caused by a faulty EGR sensor, which causes incorrect exhaust gas recirculation pressure. A tune-up consists of replacing worn out ignition components such as spark plugs and ignition coils, as well as replacing the air filter and checking other components for wear or damage. An incomplete combustion process generated due to a bad EVAP canister will cause your vehicle to have a sluggish acceleration, which you have to address immediately to prevent any undesirable condition. If the ABS and traction control light on the dashboard of your Jeep Patriot illuminates, it indicates that one or both of these safety features is not, The parking brake is an important safety device in your vehicle and should be adjusted on a regular basis to ensure that it is functioning properly. 4 Benefits of Keeping Your ABS 4WD Traction Control Lights On. Additionally, replacing oxygen sensors and mass airflow sensors can help improve the engines fuel efficiency. Over time the filter can become clogged, and will need to be replaced. 4 How many miles will a Ford Escape last? When you notice this symptom, you need to immediately attend to it, as it can severely damage your engine system. Some of the most common causes include malfunctioning engine components, ignoring regular maintenance, driving habits, and tire issues. Gas. Q: What Common Problems Impact Fuel Efficiency in Ford Escapes? However, the engine check light can turn ON as a result of several other problems, so its advisable to properly scan your vehicle for error codes with an OTC Leak Tanner or Use another Smoke machine to get the actual fault responsible for turning the engine check light ON. Evap canister replacement cost can be between $100 to $600. The If you drive a high-end vehicle or sports model, you might be told to always use premium gasoline. Drive mostly highway averaging between 80-55 mph. As the driver of a Ford Escape, You may have begun to notice a slow loss of fuel efficiency since You first purchased Your vehicle. Having bad oxygen sensors and air filters can reduce your gas mileage by up to 20%. You should also regularly schedule maintenance checks. I often take an interstate trip from Athens GA to Charleston SC. This fault alone might not cause your vehicle to function poorly, but your vehicle will not pass an emission test with this problem. CarComplaints.com Notes: The top problem trend for the 2014 Escape is transmission failure at around 70k miles. The most common causes of poor gas mileage include inefficient driving habits, faulty parts or components, an incorrect tire size or type, and not following the manufacturers service schedule. In A 2005 Ford Escape Can A Computer Chip Or A Change In The Ecm Help It To Get Better Gas Mileage? Never had this big of an issue at all. I also only use 91 oct without ethanol but most people dont want to pay for it.make sure your tires are at the correct tire pressure specd in the door jam of the driver door. Link must be about this specific problem or it will be deleted it must be free & helpful, like a video or web page or forum thread about this exact problem. In the city I get about 21 and the more I drive I can watch the gas gauge go down. When you advertise 30+ miles per gallon, and the government certifies this as true, and EVERYBODY gets around 21 mpg, it is a giant CON JOB. Still hovering right around 19-20.5. I have a Ford Escape that is getting poor gas mileage. I had the 2012 Ford Escape, now I have the 2014 Escape, the gas mileage seems to be way different from what I was told I would get. This website uses cookies to improve your experience while you navigate through the website. These cookies track visitors across websites and collect information to provide customized ads. So far, I have driven 540ish miles on the car. YourMechanic All rights reserved. Is Diesel Efficiency the Same as Ultra Low Sulfur Diesel? - 99greggymoore, Jeep Clutch Recall Involves Gladiator and Wrangler SUVs, read stories from drivers who praise our work. 2004 escape 3.0 very poor gas mileage. In fact, you are probably spending more money by running the dirty air filter than it would cost to change it. Necessary cookies are absolutely essential for the website to function properly. However, even if you are running the tires just slightly low, where the sensors dont notice, you could be wasting fuel. I drove about 5 mph slower this weekend and saw a hike, so Ive been trying to be a little less speedy, too. The fuel filter screens out contaminants in the fuel, and over time it will become clogged. are trademarks of Autobeef LLC, All rights reserved. "CarComplaints.com" , "Autobeef", "What's Wrong With YOUR Car?" Headlight Assemblies, Parts And Accessories. I use full synthetic oil. Additionally, having a professional diagnose any issues found can help ensure that all necessary repairs are completed correctly and efficiently. Sometimes, the problems are due to a mechanical failure that needs immediate attention. Additionally, you may want to consider switching to a more fuel-efficient tire size or type if you are looking for more long-term solutions. In years, this can vary. Is it OK for a 13 year old to shave their legs? The odor of something "burning" should be investigated and completely resolved first before any other repairs are attempted. Car is getting worse gas mileage Inspection, Ford Escape Serpentine/Drive Belt Replacement, Ford Escape CV Axle / Shaft Assembly Replacement, P2327 OBD-II Trouble Code: Ignition Coil J Primary Control Circuit Low, P0640 OBD-II Trouble Code: Intake Air Heater Control Circuit. Gas mileage is an important factor to consider when purchasing a vehicle. My ford only gets 18.5 miles to gallon gas! This is to know if the valve isnt leaking and closes correctly. However, other causes require a minor repair to fix, which will not cost so much. Not sure what they did, but they came back with 20 something reading, and it is still less than what EPA guidelines mentioned. Thursday, September 11th, 2008 AT 4:34 PM, Thursday, September 11th, 2008 AT 6:05 PM. I drive pretty conservatively (rarely go above 75 MPH) but dart around once in a while. Montana Montana drivers know they are required to follow the traffic laws in order to drive safely and legally on the roadways. A Look at the Possible Causes. this is an issue with many people! i have spend $70 in 3 days,, just local driving through town,, no out of town driving. When you have a vacuum leak, it will permit unmetered air into your engine, which can unbalance the mixture of the air-fuel ratio, which will develop issues in your engines system by disturbing the internal combustion process. motor but the motor runs My 2016 Ford Escape turns off as soon as i Ford Escape V6-3.0L - Window Motor / Regulator Assembly Replacement (Driver Side Rear) - Peoria, Arizona. The EVAP canister can be called a Vapor canister or a Charcoal canister. Heres What You Need to Know, How to Troubleshoot Problems After Changing Spark Plugs, How to Reset Honda CR-V After Installing a New Battery, Solving Nissan Murano Hesitation Problems When Accelerating. It was running really rough, had the codes read. We also use third-party cookies that help us analyze and understand how you use this website. . I used about 3/4 of the tank and so I filled it up with the Iowa ethanol blend they sell up there in Des Moines. Ignoring regular maintenance can also contribute to less than optimal fuel economy. DON'T DO IT! I have the vehicle that noted the BEST mileage. Denso TWIN TIP iridium plugs have PROVEN to be about the BEST plug out there! As the coolant hit the hot engine there was, once again, a threat for fire. A Look at the Possible CausesContinue, Is diesel efficient the same as ultra low sulfur? Some vehicle models will demand a high-priced part, while others are reasonably affordable or cheap. I am stuck in this vehicle for three more years. 115. computer (PCM) failure in the 2005 Escape. The vehicle will not be able to maintain a high speed due to an unstable rpm count, or you might feel a shaking sensation in your vehicle while driving. Analytical cookies are used to understand how visitors interact with the website. Ive heard that. The result is an EPA-estimated 28 city MPG and 34 highway MPG with Front Wheel Drive. If a spark plug goes bad, fuel in the affected cylinder might not combust properly, leading to poor gas mileage. Improving your driving habits, replacing faulty components, and following the manufacturers service schedule can all help improve your Ford Escapes gas mileage. Idling sounds are the best indicator for faulty spark plugs. Taylor ford does not even want to talk about four wheel drive or any other problems with gas mileage. At cold temperatures, the oil becomes more viscous, thereby reducing efficiency. The 2021 Ford Escape Hybrid is the most fuel-efficient Ford vehicle with the ability to return up to 37 highway mpg.What Is the Most Fuel-Efficient Ford? The cost of maintenance will vary depending on the type and age of the vehicle, as well as the condition it is currently in. If there is a defective sensor, there could be more fuel being injected into the system than needed, thereby wasting gas. (15.7 gallons * 24 miles/gallon = 376.8 miles a tank * 2 tanks = 753.6 miles). I run Seafoam or an injector cleaner every 3-4 tanks. How far can a Ford Escape go on a tank of gas? He took the time to tell me about other concerns that may arise with my vehicle. Our certified mobile mechanics can come to you now. My Escape is the 1.4L engine with ecoboost. Modern vehicles are designed with a lot of emission systems. What P0640 means there is an abnormal input voltage within the intake air heaters control circuit often due too a faulty air heater relay or dirty filter. Fixing problems that cause poor gas mileage in your car will in most cases save you money in the long run. But opting out of some of these cookies may affect your browsing experience. They offered the excuse that I had to break the engine in. We did not get that poor mileage in March when we bought the truck. Dirty Fuel Injectors: Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. However, this is true with any part of the ignition system, including the plug wires and ignition coil. I didnt have a choice but to purchase a vehicle,, got into a truck accident and my torrent was a right off..(not my fault other wise i still be driving my torrent V6 , which was great on gas. The Ford Edge does average on gas mileage. Issues such as clogged air filters, faulty oxygen sensors, worn or damaged spark plugs/ignition coils, low/incorrect tire pressure readings, faulty mass airflow sensors (MAF), or faulty throttle position sensors (TPS) all contribute towards reduced performance from your vehicle resulting in decreased efficiency at the pump so its important that these items are inspected frequently for any signs of trouble or malfunctioning components that could lead to decreased efficiency/performance over time if not addressed quickly enough! First, and most likely, could be a clogged up fuel pump. I am lucky to ever get 25, even at optimal conditions. When, Read More Why is My Ford Escape Getting Bad Gas Mileage? This system closes in fuel vapors and prevents the vapor from escaping into the environment. Sometimes you just cant help it though lol. Best mileage I have ever gotten on road is about 22 miles per gallon. For more information on how we collect and use this information, please review our Privacy Policy. 7. driving too fast. MPG on the dash has barely hit 20. It tells me my driving is good!But still have bad fuel economy! I put them in a DODGE HEME truck and mileage went from 14 on highway to 19.5 with a CLEAN T bound and IAC valve! I Am Getting An Avg Mpg 18 And 21.5. The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. The cookie is used to store the user consent for the cookies in the category "Performance". Fuel filters need to be replaced periodically. Ive tried resetting my fuel economy as well, and driving that same drive. Taking care of these issues should help to improve the vehicles fuel efficiency. Malfunctioning engine components can lead to reduced performance and increased fuel consumption. I do a lot of freeway driving and I have averaged 19 mpg when it was reported to get 21-30. major bummer! Regular is rated at about 87 octane, while mid-grade is 89, and premium falls between 91 and 93. Repairing the damaged parts usually is less expensive, but it gives a short-term solution. It Has Started To Almost Stall Out While Driving And Also There's A Hesitation When Starting The Car. RELATED: 5 Symptoms of a Bad Wheel Alignment. Change the air filters, replace spark plugs and perform all other maintenance thats advised. The higher the octane rating is, the more resistance your vehicle receives. "CarComplaints.com" , "Autobeef", "What's Wrong With YOUR Car?" Back to foreign for much better gas mileage than a Ford gets. That is a 30% difference in actual mileage vs advertised mileage. There is no difference between these three canisters, and you can interchange the names. I dont make lots of money, and when half my check goes to gas, there is a problem. Dirty Oxygen Sensor: An oxygen sensor measures exactly how rich or lean the exhaust gases are when they leave the combustion chamber. A bad canister can cause poor engine performance affecting the vehicles acceleration. I noted it to the dealer after 3000 miles and they said it should improve around 5000 miles. When the system is working as designed, and under certain conditions, maximum fuel efficiency will be achieved. It might be your gas. After a further 2 months of driving I had seen no improvement in fuel mileage, I again brought the vehicle into the dealership, this time the service dept reset the computer controls and was nice enough to re educate me on how I should drive the vehicle, essentially telling me not to treat it as a race car. The most common cause of poor gas mileage is a faulty engine sensor like the O2 sensor, MAF sensor, or MAP sensor. 2023 Vehicle History Inc. All Rights Reserved. I got as low as 17 miles per gal not the 23 miles per gal . . The naming depends on the manufacturer of the vehicle. Advertised MPG rating is 21 city, 29 highway, and 24 combined. When the fuel doesnt atomize correctly and mix with the right amount of air, combustion doesnt occur as it should. Here is h where the FINAL AIR/FUEL mixture is djusted by signals from the O2 sensor: OIL CHOICES! a far cry from the 23 MPG I have changed the plugs, used injector/valve cleaner and no improvement. For the cost of a new air filter, theres no reason to procrastinate. Immediately after the pressure drops, the vacuum should close. The average is about 130,000 miles. The 2013 is the first model year of the Escape's 3rd generation and proves once again that you want to avoid the first model year when at all possible. Each model in the new 2020 Ford Escape lineup features at least an EPA-estimated range of 400 miles per tank. Primarily purchased for commuting round trip average per day of 50 miles. Regular maintenance is essential for keeping your Ford Escape running smoothly and efficiently. it also estimates that . 5. Car was estimated to get 21 city/ 28 with combined 24. Over time the fuel injector system can become clogged. The EVAP canister is one of the key components in this system. I have a ford escape that is only getting 13 MPG aroung town and 16-17 mpg on the highway. If the decline in efficiency is accompanied by the vehicle pulling to one side, the brake system should be inspected immediately. Create an account to follow your favorite communities and start taking part in conversations. Drive more carefully now in my Escape, and Im using loads more gas. I drove a 2010 Ford Fusion before, getting an average of 24 MPG. Why is My Ford F150 Getting Bad Gas Mileage? Like (8) Bob Muske March 12, 2022 BAD fuel filer; d***y IDLE AIR CONTROL VALVE and THROTTLE BODY! Poor gas mileage can be caused by a variety of factors, from worn out parts to faulty fuel injectors. On top of that, the additives used in gasoline are different in the summer than they are in the winter. VehicleHistory.com MPGe. Put seafoam in tank No change! However, this is terrible for your fuel economy. Additionally, regular maintenance will help improve your vehicles performance by keeping all components properly lubricated and functioning correctly. Just a more efficient car overall, even with it being much older. Im sure Ford doesnt put the greatest oil in these things. Fuel that hasnt burned cant be used to move the vehicle, so it goes wasted. Thats what frustrates me I guess. So, up front, Im not great with cars. If the Check Engine Light comes on and reveals a bad O2 sensor, you want to replace it right away. Its rated for 18mph city but he's only getting about 12-13mpg even trying to baby it. We don't sell/share your email. The cost of repair depends on two factors: the leakage location and the cause of leakage. Went to dealership to check. When this occurs, the spark plugs fire later during the compression stroke than normal. The oxygen sensors help keep the proper mixture of air and fuel, and having this imbalance can be inefficient. Should bump up a mpg or two. I can drive city miles at a speed between 25-45mph for a while and no change. If you are thinking of how to bypass evap canister or other components in your system to evade the cost, it will expose your vehicle to more troubles, especially when it is not done correctly. Made with in Silicon Valley. Seems like its not getting what it should be. Copyright 2023 WittyQuestion.com | All rights reserved. A: To improve gas mileage in your Ford Escape, you should check the tire pressure, regularly schedule vehicle maintenance, monitor your driving habits and speed limits, avoid excessive idling, use cruise control when appropriate, and check the air filter regularly. 3 Why does my car waste more gas than usual? Your vehicles model is also a determining factor of how high your repair cost will amount to. I have change spark plugs! The best model years for the Ford Escape are 2010, 2011, 2012, 2015, 2019, and 2020, with the 2010 model year being the best due to its exceptional performance, unique technological features, and fuel economy. It does not store any personal data. This auto does not even get the in town mileage when I am on the road. miles! The 2014 Ford Escape has 6 problems reported for poor mpg. This issue has affected every Ford Escape model since the vehicle's initial release. Solving the Problem of Popping Noises When Pressing the Gas Pedal, What Does BMW IX Maintenance Cost? ; Install a set of IRIDIUM LASER earplugs from DENSO! This means that you will lose some amount of your gas usually used during combustion, which causes your vehicle to have low gas mileage, increasing your budget on buying gas for the vehicle. I do not even get in town reported mileage on the road. First, and most likely, could be a clogged up fuel pump. The cookie is used to store the user consent for the cookies in the category "Other. Following these tips can help you get back on track with improved gas mileage again! It can also be caused by a dirty air filter or low tire pressure. Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. With this small tank that takes about $35.00 to fill I am going to the gas station all the time. If they misfire, or are working poorly, this can affect your gas mileage in a negative way. Have the system pressure tested and leak detected to see if the water pump (https://www.yourmechanic.com/services/water-pump-replacement) is Hello. I drive primarily short distances during the week to and from work is 5 miles each way. We can help you calculate and track your fuel economy. If it doesn't improve soon, I may trade it in for a different make of car and tell anyone that asks never by a ford escape. This cookie is set by GDPR Cookie Consent plugin. In some vehicles, you have to apply voltage to the valve terminals in some vehicles and see if it makes a clicking sound. In addition, any brake issue can make the vehicle dangerous to drive. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. No Electrical Power in Your Chevy S10? Within a few months of its release the SUV was recalled three times, twice because of engine fires. Once again robert was ontime and performed the repair to the highest standard. Poor gas mileage, especially a sudden drop in fuel efficiency, can be blamed on a number of issues. Why is my Ford Escape getting bad gas mileage? Have been keeping track of how much gas this bugger is using, and it seems pretty off. 7 recalls, poor fuel mileage, electrical problems, front end rattles. Diesel fuel, Popping noise when pressing the gas pedal is a common problem experienced by many car owners. The answer to this question is no, they are not the same. The proper way to test your canister purge depends on your vehicles repair guide. My friend was messing woth Moreover, transmission failures occur at relatively low mileage as compared with like engines/transmissions. The price of automobile parts varies, depending on the model. There are different engine layouts and designs but most of them work in the same basic way. This seem excessive. Ive got the automatic 2.5L 2018 Escape S. Just the basic model. If you choose to use a lower rating, the ECU might adjust the ignition timing, known as dialing back or pulling timing. MPG on the dash has barely hit 20. And leave WAX and ASH s dept its cause it is REFINED from WAX and TAR! VALVOLINE is a TERRIBLE OIL in every sense! Adding more air only makes the fuel economy plummet even further. Why does my car waste more gas than usual? Most of the indicators that the oil needs to be changed (https://www.yourmechanic.com/article/when-should-i-change-my-oil) are not visible to the naked eye. The octane rating illustrates the fuels capability to resist combustion when under pressure. Ford should not advertise on their sticker in the window that you will get 34 on the road and 24 in town, when in fact, I only get 22 on the road and 17 in town. Welcome to rxmechanic.com. To fix this, all you need to do is change back to premium fuel. The car interior and exterior is simply beautiful. When your vehicle gets older, carbon starts to build up on the injectors, cylinder walls, pistons and valves. These issues can also lead to engine hesitation, stumbling and a rough idle. I do mostly Highway driving and I'm averaging around 23 mpg, that's on the highway. So when I read your post the first thing through my mind is what kind of gas are you using? You also want to ensure you use the right fuel type with the right octane rating for your car. A few of these issues are easy to fix but others are an indicator of a much more serious problem. Checking the tire pressure and have the alignment checked on regular basis can help prevent this problem. I feel this was false advertising, especially when I heard rumor of this and when noted to the dealer they assured me the rumors were false and they may have been on past models. I thought a 4 cylinder would be better on gas. If the fuel pump is no longer running correctly due to clogging, You will see a loss in gas mileage. This cookie is set by GDPR Cookie Consent plugin. A: If your Ford Escape is experiencing poor gas mileage you should locate the source of the problem and have a professional diagnose and repair the issue. If you are experiencing poor gas mileage with your Ford Escape there are several troubleshooting tips that may be able to help improve your overall fuel efficiency: first check the tire pressure; replace worn out spark plugs/ignition coils; replace clogged or dirty air filters; clean and replace fuel injectors; replace faulty oxygen sensors; have regular tune-ups performed; check engine belts; clean any debris from the engine bay; inspect hoses for cracks or leaks; and have any other necessary repairs completed as soon as possible. Last week, I only got 19.7 with average speeds of 50MPG. You can find this information on the sticker located on the drivers door jamb. 0.0 gal/100mi of gas +32 kWh/100mi. Best ever got was 24.9. Plus, remember that speeds higher than 50 mph decrease fuel mileage. 2023 CarGurus, Inc., All Rights Reserved. Another potential issue with poor gas mileage in Ford Escapes is clogged or leaking fuel injectors. I am getting 23-27 depending on the distance (more highway is typically toward the 27). I know mileage drops during the winter but we have dropped from an average of 40MPG to 29mpg on the last tank. combined. while each vehicle reaches its optimal gas mileage at a different speed, efficiency usually decreases rapidly above 50 mph, according to fueleconomy.gov, the u.s. government source for information on energy efficiency.

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