My 9000CS 2.3L Turbo 5spd 140k often got 34 MPG highway. Now it gets 28-29 MPG.
I would like to fix my gas mileage and plan to do these things:
1) Run 32psi rear and 34psi front which gives me perfect wear with how I drive.
2) New air filter
3) New spark plugs
4) O2 sensor? How do you know when you need one? I think I am running the original.
5) PCV? PVC? valve. Do I have one and will it help gas mileage to replace it?
What else will help to get 34 MPG again?
posted by 38.98.21...
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