my car is using alot of gas and i dont know why it is doing this. It is a 91 STD and for the most part it is stock just the usual stuff H/I/E cam gear high flow cat. what could be causing the sudden loss in gas milage.
thanks
Cimvochris

 

there are so many probable causes... is it throwing any codes at all?

o2 sensor would probably take the most out of your gas milage... some other basic ones would be tire pressure, fuel filter, air filter, clogged cat, etc - keep on checking around, if it's throwing a code it's most likely the o2