Site News - 1/3 Member of the Year: DougM
Date: 10 Oct 1997 17:12:16 GMT
From: "Aaron King" <>
Subject: Re: Premium Gas

Using high grade fuel in your car, even if it does not need it, will help keep the valves and piston clean. You can get carbon build up with lower octane which will eventually cause power loss. I try and use high test every five fill ups or so. Sandbagm <sandbagmnopsamcom> wrote in article <>... > DG's statement about premium gas sounds correct. I recently bought a used 91 > 900 with a 4 cyl turbo. Originally filled it with regular gas, and noticed > what I thought was a slight knock. Saab mechanic suggested higher grade of > fuel -- at least 89 octane. I tried that and it seems to have worked. Some > yrs ago I owned an 85 900 turbo, filled with regular always (as memory serves) > and experienced no knock. I believe some engine modifications were made > between 85 and 91; perhaps that explains the difference. Michael >

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