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location Everett, WA
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visits member for 3 years, 1 month
seen Dec 30 '11 at 15:12

Independent Technical Consultant & College Instructor


Dec
30
comment Will higher octane fuel improve gas mileage?
I have a 1998 Subaru Forester with the standard engine (87 octane recommended). It started throwing a 420 code repeatedly, indicating that the catalytic converter was failing. On the advice of a trusted mechanic, I started using 92 octane fuel. He said that the car's computer would automatically make adjustments to run hotter/leaner and that the higher EGT might help to clean out the cat. The 420 code stopped recurring after only one or two tanks of 92 and has not returned. Might have saved me at least $1000.
Sep
27
awarded  Editor
Sep
27
revised How do I select the right oil for my car?
fixed misconception about what the "W" stands for
Sep
27
suggested suggested edit on How do I select the right oil for my car?
May
19
awarded  Supporter