Skip the auto shop - Our mechanics make house calls

Q: Getting poor fuel mileage lower than listed

asked by on

I bought my 2013 Nissan Rogue because my Titan was using too much gas getting around. However, I am extremely disappointed at the fuel economy I've seen with this vehicle. It's supposed to get 27 MPG on the highway but I've never had better than 21 MPG, even on long, traffic-free drives. I barely have 8,000 miles on this car. Is it going to be like this forever?

A: Fuel economy has many influences on it whic...

Fuel economy has many influences on it which can raise or lower the MPG. Are you calculating fuel economy 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 trip on the highway and see what it reads. When you are idling for any period of time, this will cause a drop in fuel economy. Fuel economy will 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・Save up to 30%

Get a quote

What others are asking

Q: Locked solenoid valve

The code is for the lock up control solenoid circuit of the transmission or transmission module. The first test indicated for the code is to clear the code and see if it returns. If it does not return, then it...

Q: Car makes clicking sound, but doesn't start.

It is very possible that the battery may be compromised. When a battery is drained completely it becomes very difficult for it to charge back up again. Severe damage may have occurred within the battery while it was draining. I...

Q: How do I repair or replace the airbags?

Your vehicle’s airbags are designed to be used once. You cannot repair, reset, or replace the airbags yourself, so following airbag deployment you should take your vehicle to a dealer or mechanic to have the deployed airbags replaced. Tips Following...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.