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Date: Sat, 29 Jan 2000 12:06:13 -0800
From: "Morgan Davis" <>
Subject: Re: Regular or Premium in 2.3T?

I just got done with a 6K Mile trip in my '93 9000 CSE Turbo. A lot of the trip was through the desert in the southwest. To the point though, I have always used Chevron Premium in all of my vehicles (on the advice of several mechanics), I was forced to use 87 octane a couple of time while in some back country. A noticiable difference! Defineately a power loss and (in my opinion) the engine didn't seem to sound as smooth as it usually does. Next tank of 92 octane, immediately back to normal. I have read some articles that discuss the importance of using preium fuel with turbo engines (actually in one of this month's turbo magazines on the newstand). Chevron Premium also has their techron additive. The cost difference is so minimal, a few dollars a tank, it's worth it to me even if it is marginally better for the engine. -Morgan Davis "Julie Wardell" <> wrote in message news:86gqo0$djl$ > > Eugene C. Palmer <> wrote in message > > > my oppologies. Don't have an answer for you in regards to the 9-5. I have > however had to use the lower octane gas for my '91 9000T...don't do it. i > live in a fairly hilly area in western PA. terrible gas mileage, the car > sounds as if she's struggling etc. that's just my 9000T but you didn't ask > for that info. > > let us know if you see a difference should you try a lower grade with your > baby. > > Julie > > > > OK, so I understand the theories about using premium if it knocks, but > > I'm curious about if anyone has actually USED regular. SAAB Specs via > > the SAABNET site: > > state "87-93 RON" for both the 2.3T and 3.0T. Electronically controlled > > engines these days won't actually knock because of the knock sensors and > > controlled timing. A SAAB salesman said they could use regular. The > > SAABNET site appears to back these up. The question I have is what are > > the real world effects from real owners who have climbed hills, pounded > > the pedal, heated the engine UP and taken MPG measurements and FELT the > > power comparisons between regular and premium on tanks that were filled > > with more than 70-90% different grades of gasoline. Is there a > > significant difference in MPG and power due to the presumably retarded > > timing on 87-89 octane regular? Of course most people who shell it out > > for a SAAB aren't likely to skimp on the gas and even buy regular unless > > they had no other choice. I'm wondering if there is anyone who has > > actually done so. > > > > Thanks, > > > > EugP > > Berkeley, CA > >

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