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jeez....always 93 for my fast. then again, I'm running the GIAC 93 octane program...I should probably just stick with it.
 

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BTW!! Using anything less than 91 in our cars is NOT RECOMMENDED by VW. Using a fuel that has a less than recommened octane rating can result in Detonation!!!!! Be VERY CAREFUL WITH THIS!!! Just hope you guys realize you're chancing it to save 2-3 bucks!!!!
 

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I personally just put in super wherever I go...93 is at $3.47 per gallon here so I suffer from "empty wallet" syndrome.

If its good for my fast I must do it

Since 93 has a higher hydrocarbon concentration, it doesn't burn as fast and gives you better milage...In the end, it averages out to the same.

thats my 2 cents
thank you for the precise explanation!!! This is exactly why you shouldn't put regular in your fast. TO PREVENT DETONATION!!! Which to my understanding is when a cylinder detonates early, and screws up the timing and so on which = bad for your fast.
 
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