Mileage I Have Experienced on Different Brands of Gasoline

Gas Mileage

Here's some interesting trivia about gas mileage. Have you ever wondered which brand, grade, or octane rating gives better gas mileage? Well, I've collected thousands of miles of data on a wide variety of brands, octane ratings, grades, etc. All this information is from my 1967 Ford Mustang. I have found these results interesting, I hope you do as well.


Did you ever wonder if there was really a difference in the performance of different brands when it came to gas mileage?

Only brands used more than 10 times are included to try to eliminate deviant results.

BrandNumber of EntriesAverage MPG
Cennex 62 15.56
Conoco 60 18.24
Exxon 58 16.87
Holiday 19 18.76

I, of course, make no guarantees about what kind of gas mileage you may receive in your vehicle, even if it is a '67 Mustang with an L200 and a couple hundred thousand miles under the hood, because there are way too many variables that come into play...