Better mileage with 94 octane?
03-23-2003, 04:22 PM
#1
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Better mileage with 94 octane?
I took a little road trip this weekend, and on the return leg, I filled up with Sunoco 94 instead of my usual Exxon/Texaco 93. Well, taking the exact same route both ways, and driving at about the same level of enthusiasm, I seemed to average 1 mpg better on the 94 (according to the trip computer). Any thoughts?
03-23-2003, 04:44 PM
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I believe it...(more)
The following chart is a summary of all the gas I've put into my S4. I don't think the Texaco and Exxon figures are reliable, since there are only two samples. But I've averaged 19.8 MPG in 20 fill-ups of Sunoco 94 versus 19.0 MPG and 18.6 MPG for 24 fill-ups of Mobil and Chevron 93. If you average the Chevron and Mobil fill-ups, you end up with about 18.8 MPG, or 1 MPG less than the Sunoco 94.
Also, these figures are from calculated MPG, not the trip computer which is optimistic by about 2 MPG.
<img src="http://pictureposter.audiworld.com/26345/avg_mpg.jpg">
Also, these figures are from calculated MPG, not the trip computer which is optimistic by about 2 MPG.
<img src="http://pictureposter.audiworld.com/26345/avg_mpg.jpg">
03-23-2003, 05:32 PM
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I've been testing that for the last couple months, I'm getting average of 2-3 mpg more on 94
My 1993 S4 is a pig, I was running ave of 17 on mobil 93, I'm seeing 19's and 20's on tanks of sunoco 94.
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03-23-2003, 06:18 PM
#8
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FWIW I noticed almost no average MPG difference btw 93 & 94.
68 samples of 93 octane = 18.11 MPG
47 samples of 94 octane = 18.17 MPG
Also calculated and not from trip computer.
47 samples of 94 octane = 18.17 MPG
Also calculated and not from trip computer.
03-23-2003, 07:05 PM
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Yeah, that's a possibility - most of the terrain was mountaneous
However, there were plenty of long uphills and downhills both ways, and traffic was about the same each way, also.
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