Quote:
Originally Posted by Packofcrows
93 you'll notice bit more response and better mpg. Thats it. 91 it feels the same as 93 but with about 3-5mpg less. IMO
I only use Shell 91 or Chevron 91. No 93 in central CA
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There's no 93 really in any of CA, I've never seen it in Socal. It sucks because I would like the mpg gain and fewer lost ponies to 91.