Q: I'm getting 8.9 mpg in the city and around 12 mpg on the highway.

asked by on

I'm getting very poor gas mileage. (8.9 city/12 highway) I've taken my vehicle to the dealership 4 times and first they said they would do an oil consumption test. That was completed and they replaced my piston rings. I'm spending so much money on fuel, it's ridiculous. I asked for a tune-up and they said GMC doesn't recommend a tune up until 100,000 miles.

My car has 69897 miles.
My car has an automatic transmission.

Hello. If they replaced your piston rings and the problem has persisted, then it is likely that the problem was not related to the piston rings. Most fuel issues are related to engine performance or fuel system problems. A tune up would not be a bad idea, but I would recommend having the fuel and engine management systems thoroughly diagnosed as the MPG that you are experiencing is way below the acceptable rating for that vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I'm getting 8.9 mpg in the city and around 12 mpg on the highway.

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: The car stalls at low RPMs and during idling

A sticking or stuck idle air control valve can cause this condition. The valve needs to be removed and inspected for excessive carbon buildup. The valve could be cleaned and then then re-installed to see if proper operation can be...

Q: Check Engine code P0170

Hi there. I see you've replaced the recommended parts that supplement the error code. Another reason why your vehicle maybe not be receiving sufficient fuel is because of a clogged or obstructed fuel filter and pump. When your vehicle gets...

Q: How do I use the delayed locking feature?

The delayed locking feature is present on some models of the vehicle. The feature occurs automatically whenever the door lock switch is pressed inside of the vehicle while a door is open. When all doors are closed, the vehicle will...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.