Date: Wed, 2 Mar 2005 11:55:16 -0800 From: "Dima" <dimanospamystems.com> Subject: Re: Saab 9-3: What octane to tank?
Here is some data that could be useful. WE bought a 2000 9-3 Viggen and brought it from Ohio to Oregon. The previous owner apparently used regular gas. We started filling up with premium. Data: 1st fill up - approx 27mpg 2nd fill up - approx 29mpg 3d fill up - approx 31mpg 4th fill up - approx 33mpg and stayed there (if we stayed under 80mph, of course). The ECU adjusts to the better gas, but it takes a couple of fill ups. -Dima "Happy" <notnospamd.com> wrote in message 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 > :-) > > Any recommendation, experience? > > What do you use? > > >