Date: Mon, 28 Feb 2005 15:04:54 -0800 From: "Happy" <notnospamd.com> Subject: Saab 9-3: What octane to tank?
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 :-) Any recommendation, experience? What do you use?