Mileage by Brand and Octane for My 1976 Toyota Celica

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 1976 Toyota Celica. I have found these results interesting, I hope you do as well.

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Octane Rating by Brand

So, the first question I got from someone when I showed these gas mileage calculations off, was "What about octane of specific brands - that would probably be more useful." So, here it is... Gas mileage results from my records for different brands at specific octane ratings.

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

Brand	Rating	Number of Entries	Average MPG
Cennex	85.5	176	22.11
Cennex	87	207	18.93
Cennex	88	26	20.94
Cennex	91	16	21.04
Citgo	91	14	22.44
Conoco	85	68	16.53
Conoco	85.5	137	20.94
Conoco	87	48	20.03
Conoco	88	55	17.32
Conoco	91	107	17.09
Exxon	85	36	19.49
Exxon	85.5	100	21.18
Exxon	87	117	19.76
Exxon	88	37	18.94
Exxon	91	51	17.74
Holiday	85	16	18.53
Holiday	85.5	103	18.78
Holiday	87	18	22.9
Holiday	88	38	20.57
Holiday	91	24	19.38
Mini-Mart	85	18	13.1
Safeway	87	41	21.22
Sinclair	85	21	19.08
Sinclair	88	14	19.91
Sinclair	91	14	20.54

I, of course, make no guarantees about what kind of gas mileage you may receive in your vehicle, even if it is a '76 Celica with a 20R and nearly half a million miles under the hood, because there are way too many variables that come into play...

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