Q: Q: low gas mileage

asked by on

My GMC has been extremely low on gas mileage. I drove to pick up my brother about 5 to 7 miles away, and I had 2 quarters of a tank of gas – a half a tank when I left the house. When I got to my brother’s house I had only a quarter of a tank left. It’s been eating gas like crazy after I got my oil change. I put 5 quarts of oil in, and I still needed to put in two more quarts. I haven’t done that yet. I made the mistake of getting an air filter instead of an oil filter. I had the fuel injectors cleaned last July. Do you have any suggestions that will help me fix this problem?

Decreases in fuel economy are caused by things like fuel control issues (fuel injector leaks, bad O2 or other sensors), transmission problems (won’t shift into high gear, slipping, torque convertor clutch fails to lock-up), misfires (ignition related), low tire pressure, or dragging brake calipers. I recommend having a trained professional inspect your car in order to determine why it is getting worse gas mileage. From there, they will be able to help you move forward with any repairs needed.

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. Q: low gas mileage

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: loss of power sluggish

I recommend inspecting, then cleaning the throttle body if any deposits are found. It's important to do this with key off and disconnect the electrical connector to throttle body. Do not put your fingers in there until it is connected....

Q: How do I get the maintenance required light to stop blinking and my temperature gauge to be normal?

Hi there, thanks for writing in. The Toyota maintenance light is a reminder to get your oil changed. This light comes on periodically and needs to be reset with every oil change. As for the temperature gauge this is normal....

Q: Q: Vehicle will sometimes turn over, but not start

Based on your description, it sounds like your 2007 Mercedes GL450's fuel pump may be randomly shutting off. This can be due to a malfunctioning powertrain control module as the repair shop told you. This can also be related to...

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...
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.