Advice or tips for tune up - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-19-2005, 12:06 PM   #21
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John Deer Boy: you're right. Performance picked up again. The control system must be using adaptive software. Whew! I was afraid I had blown it.
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Old 11-19-2005, 12:11 PM   #22
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dimprov, can you put your year and trim level in your signature?
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Old 11-29-2005, 01:04 PM   #23
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I updated my signature. I hope it shows up when I do this post.

I guess the software adapted, because I have my performance back.

I'm getting about 20.5 miles/gallon on mostly freeway driving. Does that sound about right for a 1996 SSEi? Do high speeds drop performance by a lot, or is that mostly an old wives tale? I obviously realize that will be some impact, but my SSEi is more aerodynamic than a truck. I'd like to figure roughly what an extra 20 miles per hour is costing me. If it'* more than my day job, then I guess it will "pay" to go slow now that gas prices are so high (now $2.65 per gallon for premium).

For a city driver, what'* the rule of thumb for how often to change the air filter? It seems so subjective. The last time for me was about 10,000 miles ago.
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Old 11-29-2005, 01:54 PM   #24
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The higher the speed the lower the gas mileage. Plain and simple. The fewer WOT sprints, the better your gas mileage. Change to a 3.4 pulley..you'll notice there'* a direct connection from your right foot to the hole in the bottom of the gas tank. (I'm not complaining..I'm addicted to the feeling)


Air filter...when it is dirty. it'* not the type of driving as much as where and in what kind of air quality.
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