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98 forester terrible gas milage


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I have a 98 forester that I have owned for 3 years. The best gas milage I have ever gotten was on a long freeway drive, where I averaged about 20mpg. I normally do only city driving and get about 16-17mpg (which seems bad). I recently checked my milage and now find I average about 15mpg - which seems awful! I had a tune up within the last year and new tires within the last 6 months. When I originally purchased the car I replaced the air filter with some special filter that was supposed to improve the milage (can't remember the name offhand), the best I ever got was 17 mpg. Any suggestions? Thanks

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4 suggestions:

Pitch that K&N filter

Test/clean/replace MAF

Test/replace front O2 sensor

Test/replace temp sensor.

I'm sure you will get more suggestions but I would start here.

 

 

Thanks

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