Date: 26 Oct 2001 15:18:47 +0200
From: Arne Adli <>
Subject: Re: Which grade of fuel for 98 900SE Turbo?

Just Bob <> writes: > On Fri, 26 Oct 2001 02:36:38 GMT, "Harry Davis" > <> wrote: > > >I don't know about the NG900's but in our 3 9000's and my wife's 9-3, we > >found that the mid-range worked the best. > > An NG turbo is supposed to run on premium. The NG Turbo is made to run on on a broad specter of octane. Since it has knock-detection, it easily adapts to the fuel grade. Running on Normal is no problem > If you use lower grade, it > may knock under acceleration. When that happens, the engine will > retard the timing to stop the knock so you get worse performance. > You will compensate by opening the throttle more and using more > gas as a result. If you get knock there is something wrong with the engine, the ECU will adapt to the fuel grade before knocking occures. The perfomance will of course be better with higher grade fuel. -- Arne Adli '96 Saab 900 SE Turbo

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