I only buy Sunoco now and only at the supplier, so i think it's the best i can get in the area. I do not run on straight pump now that the compression is at 12.5. I tried it will 3 gals of Dragon 110 to full tank of 93 Sunonco and could hear detonation while street driving. From stop to moderate acceleration. Full 5 gal pail and no detonation that i see yet. From what i remember back in the day when all the cars had high compression 100-102 octane is all they had at the pump if i remember the story correctly.