Quote:
Originally Posted by JdMs2k
if you are gonna start runnin a higher octane in it you might wanna consider getting your ecu programmed cause a diff octane fuel could cause it to trip out n causing the engine not to run right..
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The ECU will conform to whatever is in the tank. It doesn't matter what your using (85 or 100 octane), the car will change fuel delivery, spark timing, etc. to make the car run correctly.