Help Im only getting about 20 MPG I was getting around 28
10-07-2006, 08:24 PM
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Help Im only getting about 20 MPG I was getting around 28
<center><img src="http://pictureposter.audiworld.com/102386/audi_004.jpg"></center><p>Why might I all asudden be getting such bad mileage? I checked the plugs-good, check the air filter-good, tire pressure 40psi-good, fluids-good, no codes. All stock and been real easy on the pedal what might cause this loose in mileage?
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10-10-2006, 04:29 PM
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Re: Help Im only getting about 20 MPG I was getting around 28
Good news the check engine light can on. Have a question though before it came on I dropped 2 bottles of STP fuel injection cleaner in it and let it clean. Now the check engine light came on and it says O2 senser bank one sensor one and O2 bank two sensor one is responding slowly . Do you think this was my problem all along or do you think that happened because of I dropped so much cleaner in a 14 gallon tank?
10-10-2006, 07:27 PM
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My concern...
with that much fuel system cleaner is the condition of your spark plugs. I'd pull them and check for horrid ash deposits from the cleaner.
How old are your O2 (age and mileage) sensors? They may well be over the hill.
How old are your O2 (age and mileage) sensors? They may well be over the hill.
10-11-2006, 03:13 PM
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I have bad experiences with STP: CEL's for misfire, plug deposits, rough idle, etc.
I have had good experiences with Marvel Mystery Oil, BG 44k, Redline SI1, LubeControl FP60, and Lubromoly's two cleaners Ventil Sauber & Jectron.
Avoid STP like the plague. The double dose of STP probably contributed to your loss of MPG. My problems with STP came on a single dose in a 15 gallon tank.
Avoid STP like the plague. The double dose of STP probably contributed to your loss of MPG. My problems with STP came on a single dose in a 15 gallon tank.