Skip the auto shop - Our mechanics make house calls

Q: Leaking coolant and poor gas mileage.

asked by on

My vehicle is getting poor gas mileage. It is only getting 8-10 mpg when it normally gets 17. The truck is also leaking coolant even though I do not see any visible leaks.

A: Some key things to check to ensure your veh...

Some key things to check to ensure your vehicle gets correct gas mileage would be your air filter, fuel filter, quality of fuel, and oxygen sensor integrity. A dirty air filter will suffocate your engine causing bad gas mileage. Dirty fuel entering the engine caused by a dirty fuel filter will cause the engine not to produce as much power thus travel less miles in exchange for the same amount of fuel. The same goes for bad gas itself. If your oxygen sensors are malfunctioning this can cause your engine to run rich and thus decrease your fuel mileage. I would recommend having a professional come to inspect your vehicle to see which of these is at fault.

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: how do you change a crankshaft position sensor

Hello there. It is located on the right (passenger) side of the engine under the ignition module in the engine block. You can see it from the underside. The easiest way to see and get to it is to jack...

Q: No Start. Fuel delivery issue

Hi there, thanks for writing in about your 1993 Toyota Pickup. You should check all the relay connections to see if the wire connections are corroded and losing relay connections to the relays. This vehicle is known to get badly...

Q: How do you know if its really a timing chain gasket? And how long does it take to repair?

It is more likely that the water pump is leaking from its front seal. The leak will show up from the center of the motor area and will drip off the bottom of the timing cover. The timing cover on...

Related articles

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...
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.