Mileage by Fuel Grade and Type of Driving for My 1967 Ford 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 Fuel Grade

Well, after being asked about brand and octane rating, and then about brand and driving type, I figured the next obvious one to address was grade and driving type. So, before anyone asks...

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

BrandDriving TypeNumber of EntriesAverage MPG
Regular Unleaded City 58 12.6
Regular Unleaded Highway 36 21.8
Regular Unleaded Mixed 37 18.09
Unleaded Plus Highway 20 21.77
Unleaded Plus Mixed 32 17.58

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...