Quote:
Originally Posted by redpoint5
I'm not familiar with those brands, but gas is gas, unless it has extra detergents. and even then it's still just gas. There are way too many variables at play to attribute better mileage to the brand of gas you happen to be running.
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Very true. Might as well buy gas where it is cheapest. When you buy from an unbranded station, the gas your are buying is usually surplus gas from a branded shipment. You won't know what brand it is, but it doesn't matter.
The only time I ever noticed a difference in mileage was decades ago when Shell was advertising it's superiority with inclusion of an additive called "platformate".
Oil and Petroleum Commercials: Super Shell
I was on a cross country trip in the 1970's in an old American car that was carbureted. The best price of gas in one town was the same as that for Shell brand, which I had never used before because it was always higher priced. We filled up with Shell and at the next fill-up we found that our MPG was significantly better than using the usual no-name or non-Shell gas. I and my traveling companion are very skeptical by nature, but we had to admit there was no other explanation other than that Shell gas apparently had different additives in it. I never used Shell after that because their higher price offset any advantage in mileage gained. But as reluctant as I was to admit it, there must have been some truth to their advertising, because that one tankful of gas
did produce superior results.