Tune Time.
1)new spark plugs properly gapped.
2)new air filter (check every 35000 miles)
3)new fuel filter (every 35000 miles)
4)1 bottle of STP fuel treatment (red bottle) 4x a year.
5) oil and filter change (castrol or another good quality oil every 3-4000 miles.
6)proper air pressure in tires (check every 2 months
7) service transmission every 40000 miles or less.
New oil and filter
8) new plug wires every 80000 miles.
2002 ford focus with a very poor gas mileage
Could be a few things , bad plugs, and the PVC valve might need to be replaced, check the air filter to see if it is cleaned, and air cleaner.
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