I have a brenspeed 93 oct tune - I bought my 2010 GT last August and the ONLY gas I have but into it is Chevron. Well we shop at Kroger and now you can get get Shell gas for .10 off with the Kroger card. So I am thinking of switching - thoughts? Does it really matter? Any diff. between Chevron and Shell?

 

Yes....you must use one brand forever......lol....no really....just use the proper octane.

 

As long as you buy from relatively name brand solid companies, you stand the same chance of bad gas as if buying from any of the others. Just buy the right octane and you're set.

I love my ExxonMobil card with speedpass, saves me 5% of the gas cost which really adds up these days.

 

HAHAHA - Thats funny!

 

Make sure that the font for the label showing the "93" octane wherever else you go is the same as it is at all the Chevron stations. I worry that the brands of 2% milk other than the WalMart brand might be orange juice or lemonade.

You're wrong, not "most likely". More like "Most certainly"...