Date: Wed, 02 Mar 2005 06:32:28 +0000 From: Pooh Bear <rabbitsfriendsandrelationsnospamail.com> Subject: Re: Saab 9-3: What octane to tank?
Laura K wrote: > "Happy" <notnospamd.com> wrote in news:4223a3ae$1nospam.microsoft.com: > > > I have tried 87, 89, 92 with no noticable difference, although I suspect > > to feel a more little vibration when idling on 87. > > > > The manual recommends 92, but says it can run lower grade as well. > > > > The only reason why I will tank 92 would be if 87 would be bad for the > > engine or shorten its lifetime. If I were to reason about this, I would > > actually think that 87 causes lower heat and less violent explosions, > > actually prolonging the lifetime. But I suspect it doesn't work that way > > :-) > > Is it a turbo? In my 1997 900SE, I get the most fun with premium (92) also > the best mileage at highway speeds. If I'm just going to be driving around > town, I'll use midgrade (89). Not as much ooomph when the turbo kicks in but > acceptable. Mileage drops though. > The first time I ran 87, I thought the turbo had died. It came to life again > when I put 92 in it. That's not unsurprising. Any decent modern car like a Saab adjusts its ECU to the fuel. Unlike a carburettor car it doesn't even need retuning. Depending on your driving pattern you may wish to choose for optimum mileage or optimumm performance. I can only suggest you try it and draw your own conclusions. Graham