Quote:
Originally Posted by 540iSUP
Quote:
Originally Posted by carseatsm5
We're only 91 octane here so I throw a gallon of race gas in just for fun when I fill up and am in the mood. I feel a difference but probably just in my head.
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Where in Ca is this?! |
[QUOTE=540iSUP;28684660]
Pasadena Auto Wash sells 100 octane at the pump. However they only let you do it if you're getting a car wash from them.
I would fill the C63 with two to three gallons of race fuel and top off with premium in order to average 93 octane. It may have been imagined but the backfires seemed better with the higher octane fuel.