[QUOTE]Originally posted by shingles
[B]But how much do you really save that way? I

 

The higher the octane, the slower the cumbustion. If you put a lower octane fuel with normal ignition timing, it will burn before the optimal point -- preignition. The ecu will detect this and retard timing, thus the lower performance.

Which is what gets me about people with cars designed for lower octane fuels putting the high octane stuff in because they thinks it's better for their car. Unless something's wrong with their car (or they advanced the timing on their own, a trick for a couple more HP in miatas), their likely just wasting their money and wasting fuel (it doesnt completly burn).. oh well..

 

Doh! I wasn't paying attention last on Friday at the pump and put a tank of Regular Unleaded (87 octane) in. I can assure you that even with the ECU, that octane rating cannot provide the stociometric mixture in this engine!

Cheers -

 

DAMN>>>>If you can't afford to fill s2k with real gas (93 of course), I don't think you can really afford to have this car. Quit posing like you have $$ and buy a civic......Is a 10 cent price difference going to take food off your table?>>>>>