Skip the auto shop - Our mechanics make house calls

Q: My gas mileage has dropped to 22 mpg, what could be the cause?

asked by on

Mercedes-Benz c class 220cdi avantgarde spend 22mpg . In been in road for 8 month. no have smoke frome exhaust . Have to much power going very good . Just it spend in extrem fuel. Can you help me plz

My car has 12189 miles.
My car has an automatic transmission.

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
  1. Home
  2. Questions
  3. My gas mileage has dropped to 22 mpg, what could be the cause?

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: High mileage, Help avoid issues?

Fresh fluids are a good place to start. Change the engine oil to a high quality synthetic like Mobile 1. BMW consider's their transmission fluid to be "lifetime" but that unfortunately means for the life of the transmission, so changing...

Q: I can put my clutch in and put the car in gear and car won't die?

The first issue sounds like you have throttle problem. You may want to take off the intake and see if your throttle body is moving freely. It could be dirty and need to be cleaned. Check the cable that is...

Q: Got a trouble code P0171.

The purpose of the No. 2 sensor is to monitor the efficiency of the catalytic converter. Consequently, if everything is functioning correctly, the No. 2 sensor is supposed to report a constant voltage. If the No. 2 sensor waveform mimicked...

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...
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...
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.