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Re: Which grade gasoline to use? 700 1989

posted by  someone claiming to be Aaron on  Mon Nov 12 20:34 CST 2001 [RELATED]

Hey,

David is correct, i don't know where i read it, but the way it works is it monitors pinging, and advances the timing to as far as it can, i.e. just before pinging occurs, thats why, when pinging does occur, it NEEDS to retard the timing. Of course, there's limits to this, running 98 ocatane fuel will not give better performance than, say, 95, but 95 will be a large improvement over 87...... The car runs at it's most efficent *just* before the pinging stage, so thats where the computer tries to keep it at. Thats why you notice when it's colder (20 degrees celcius) the car will run quicker, after it's been driven for 30 minutes. Drive the car for 30 minutes in heavy traffic on a 35 degree celcius and take off, and it feels like someone's unplugged an injector..... Anyways, thats my .02 cents, but hey.....

Az





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