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Date: 11 Oct 1997 02:10:50 GMT
From: "T &  R  Loveitt" <>
Subject: Re: Premium Gas

guys, All newer SAAB turbo model cars use a computer controlled APC system. I senses engine knock and retards timing to try to eliminate it. Useing 93 octane fuel will allow the APC computer to run the engine with full timing advance and thus full potential power. Running a SAAB turbo on 89 octane is a crime. T. 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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