Mileage by Brand and Type of Driving for My 1967 Mustang

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.

Driving Type by Brand

So, following quickly on the tail of being asked about comparing the brand and octane rating for mileage, I, of course, got the quite obvious (to the point that I'm not sure how I overlooked it) question of "What about brand and driving type?"

Only combinations that have been recorded more than 10 times are listed to try to eliminate deviant results.

Brand	Driving Type	Number of Entries	Average MPG
Cennex	City	40	12.58
Cennex	Highway	12	22.54
Conoco	City	16	12.69
Conoco	Highway	25	22.06
Conoco	Mixed	19	17.89
Exxon	City	15	12.7
Exxon	Highway	15	20.71
Exxon	Mixed	28	17.05

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...