I heard they take bids for gas from all except Arco? or something like that, but they are not low quality gas.
The New Costco in City of Industry was $1.05 yesterday great place to go so new there's almost nobody there (but don't shop there, even thru they moved to the bigger location too many people still go there).
As for 87/92 debate, I read the article from C/D and I find it very true (but most of the cars they tested were v-6 or above engines). I don't have a performance vehicle but it's a sports car (95 mustang coupe V6) and I find with premium I jerk less when shifting gear one to two to three (stick) and it accelerates smoother. In the past I also noticed when a car gets older there seems to be a performance difference too in using 92 gas. Wish C/D tested more cars (maybe a few non-turbo charged four-bangers to see how much they would improve) and at different ages to see if it really does matter.