Skip the auto shop - Our mechanics make house calls

Q: Fuel mileage is worse than advertised

asked by on

At only 30,000 miles, I'm noticing that my 2011 Hyundai Elantra is not getting the kind of fuel economy which Hyundai promised in the information given to me before buying this car. The dealership has offered to reimburse me a small amount via a debit card for fuel, but I just want the good fuel economy I was promised! Is there anything I can do to improve the mileage my car gets? My commute is very far and paying for all this gas is hitting me financially hard.

Fuel economy has many influences on it which can raise or lower the MPG. Are you calculating the fuel economy figure per tank or off the trip computer? The trip computer is a constant average that might be resettable (see owner manual). If so, reset it on your next long highway trip to see what it reads. When you are idling for any period of time, this will cause a drop in fuel economy. Fuel economy will also be reduced by speed, acceleration, poor tire psi and condition, the load inside the car, weather, and terrain. For example, driving 20 miles to work up a hill and never getting above 30 MPH will lower fuel economy. Highway mileage, in theory, means cruising at 60 MPH and during that time you will be close to what the rated MPG is. The EPA Fuel economy is measured under controlled conditions in a laboratory using a standardized test procedure specified by federal law. Manufacturers test their own vehicles—usually pre-production prototypes—and report the results to EPA. EPA reviews the results and confirms about 10%–15% of them through their own tests at the National Vehicles and Fuel Emissions Laboratory.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car keeps jerking, almost like when a stick shift switches gears but I have an automatic 2012 Hyundai Sonata

Hello, thank you for writing in. The first possibility that comes to mind is the air intake sensors. Start by making sure idle air control valve, throttle, and EGR systems are all working well. These types of components can be...

Q: I drives Toyota corella S 2005 model.My check engine light is constantly on and I noiced there i

If the spark plugs have not been changed in 85K miles, then I suggest putting in new spark plugs. Also, you would need to put a fuel injection cleaner in the fuel tank to help clean out the fuel system...

Q: What tools are needed to remove the exterior door handle?

Hello. If you have successfully removed the interior door panel, then you are off to a good start. The only tools that should be required to replace the exterior door handle are a set of screwdrivers and a regular socket...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.