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      11-19-2011, 11:40 PM   #17
gatorfast
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Drives: F80 M3
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Quote:
Originally Posted by Jumbosock View Post
By the way... not to get off topic too much but I'm shocked you use Costco gas.
How come? 91 octane is 91 octane. I've used many different brands including the so called top tier and never noticed any sort of difference.