. . . and the common conception about Arco might be due to it's being refined from mostly lower grade Alaskan crude. I've noticed differences in response, too, when I was driving a relatively high performance VW GTI, but now that I'm driving a Honda Civic, I've never noticed a significant difference between brands. I still prefer to buy branded gas rather than from independents due to a few bad experiences with sediment contamination, though . . . it's cheap insurance to pay a few pennies more per gallon than to have to replace a fuel filter . . . regards, Art