Is that city and highway average? 19MPG is great if it is. It sucks for highway only.
Have you checked for any codes yet? Maybe you have a marginal O2 sensor that could contribute to this problem or dirty injectors? Consider cleaning the throttle body and disconnecting the battery for at least 60 seconds to reset the IAC learned values and ensure an efficient idle.mishutka said:Performed tuneup on my 2000STS (118k miles) no change in MPG reading - average is still around 19 MPG. My mechanic changed spark plugs, air filter, fuel filter. Car tires properly alligned.
Could he have not check for proper spark plug gap?
I can't check this easily as I need to dismantle the cover under which they are located.
Greatly appreciate your insight.
Ditto. This does not improve mpg as much as we'd hope it would.Ranger said:Unless it was in absolutly horrible condition, I would not expect much improvement in milage assuming the same driving conditions.