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Date: Tue, 25 Jan 2000 15:31:10 GMT
From: "scot sak" <swsnopsamaone.net>
Subject: Re: Regular or Premium in 2.3T?


I would have to agree that even my 97SEt runs fine on 87oct. But during the warmer months I receive an increased MPG and slight performance with 98oct. I even figured that with my MPG increase the cost per mile was almost the same. Thomas Cormen <thcnopsamipuedes.cs.dartmouth.edu> wrote in message news:wrln5fjuy7.fsfnopsamipuedes.cs.dartmouth.edu... > "Eugene C. Palmer" <eugpnopsamerfs.berkeley.edu> writes: > > 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: http://www.saabnet.com/tsn/models/2000/ts95w.html > > 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. > > I have a 2000 9-5 wagon, and I've put only 87 into it. I live in a > hilly part of New Hampshire, and I go up some very steep hills on my > daily commute. Hills steep enough that they would not allow the roads > on them to be built today. > > My 9-5 absolutely shoots up these hills, and I have yet to hear a > knock or ping. And I am very sensitive to any noises from my car. > > I have no idea what would happen with 89 or 93 octane, and I have no > interest in finding out. 87 is expensive enough right now. > > --THC > > ------------------------------------------------------------------------ > Tom Cormen Voice: (603) 646-2417 > Associate Professor Fax: (603) 646-1672 > Dept. of Computer Science Email: thcnopsamartmouth.edu > Dartmouth College URL: http://www.cs.dartmouth.edu/~thc/ > 6211 Sudikoff Laboratory > Hanover, NH 03755-3510 > ------------------------------------------------------------------------

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