Date: 24 Jan 2000 11:28:00 -0500 From: Thomas Cormen <thcnopsamipuedes.cs.dartmouth.edu> Subject: Re: Regular or Premium in 2.3T?
"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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