octane adjustment
#11
RE: octane adjustment
ORIGINAL: Feng Houzi
Is it true that the car's cpuwill adjust itself for higher octane? I think i read that on here somewhere, but i can't find it... I googled it but nothing came up...
Is it true that the car's cpuwill adjust itself for higher octane? I think i read that on here somewhere, but i can't find it... I googled it but nothing came up...
As far as gas mileage goes. 93 octane is 30 cents more per gallon here than 87 octane or about 10% more. There is no way 93 octane on a stock tune is going to give you 10% better fuel economy. Driving differently, though, could easily save you that amount.
#13
RE: octane adjustment
93 is usually a better quality gas and many people are having knock problems with the lower octane in the summer heat...I have always put 91-94 in, tried 89 once and the car didnt exaclty like it and I got crap for milage...could have been bad gas but never had that problem with higher octane.
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