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Old 08-12-2008, 07:39 PM   #7 (permalink)
cfg83
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1999 Saturn SW2 - '99 Saturn SW2 Wagon
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SVOboy -

Quote:
Originally Posted by SVOboy View Post
Well, this is one of those things no one can really say. It depends highly on the car, the temperatures, and other junk. The best way to tell would be to test it for yourself with a SG
I would be leery of using the SG to quantify the actual % gain. From what we (think we) know, the SG is using an algorithm to determine MPG, and the IAT is a significant parameter in that algorithm (see here). The ECU/PCM, however, is using the 02 sensor's Air/Fuel ratio to determine how much fuel to inject.

CarloSW2
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