Date: Thu, 09 Jun 2005 02:52:26 +0100 From: Pooh Bear <rabbitsfriendsandrelationsnospamail.com> Subject: Re: Synth Oil Chg Interval on a Viggen?
Dave Hinz wrote: > On Wed, 8 Jun 2005 17:27:45 -0400, WitchDr <Witch**DRnospamnobulkemail.net.ru> wrote: > > > > "Johannes" <johsnospamblock7363sizefitter.com> wrote in message > > news:42A6FB48.DDC0D841nospamblock7363sizefitter.com... > >> Higher octane is better. I find that my 9000 CSE LPT will sometimes cut > >> out > >> if I accelerate very hard on regular petrol. But this does not happen with > >> Optimax or other high octane. > > > > Saab's and most other cars run fine on regular unleaded. If you have a high > > pressure turbo (over ~8psi/.5Bar) then you start needing higher octane. Saab > > even touts the fact that their turbo cars don't need high octane gas (save > > Aero/Viggen/HOT). > > That may be, but the engine management of Saab turbo cars since APC came > in in the mid-80's, will take advantage of octane that you give it. It > doesn't _need_ it; you won't damage the engine with low-octane fuel, > but you _will_ get more boost (and therefore horsepower) with higher > octane fuel. Been that way for Saab for about 20 years now. The nice thing is that it does it automatically. My previous car with a Bosch Motronic engine management had an octane selector uder the hood. You could set it to 85 or 88 RON depending on your choice of fuel. Graham