cobalt Posted March 16, 2009 Share Posted March 16, 2009 This winter I have seen a mileage drop from 21-23 city to 17-19 and 28-29 hiway to 23-24. This is an o6 forester xt with 35,000 miles . Air filter is clean, use Pennzoil platinum and drive sensibly staying off the turbo as much as possible. The plugs have not been changed. Could ethanol be the problem? I live in Utah but the cold weather never affected the mileage until now. I`m wondering if the maap sensor or oxygen sensor should be checked. Any ideas?...Thanks:confused: Quote Link to comment Share on other sites More sharing options...
86subaru Posted March 16, 2009 Share Posted March 16, 2009 iam in the same boat, but 170,000mi legacy a/t wagon i have changed everything , except rear 02 sensor, still getting 1 code map sensor, which could affect mpg, i am only getting 20 city , Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.