Date: 9 Oct 1997 22:03:17 GMT From: sandbagmnopsamcom (Sandbagm) Subject: Re: Premium Gas
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