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Old 02-20-2013, 10:18 PM   #14 (permalink)
13B_88FC
EcoModding Lurker
 
Join Date: Jan 2013
Location: Oregon, US
Posts: 43

ZoomFreakingZoom - '88 Mazda RX7 Convertible
90 day: 19.02 mpg (US)

Geo - '96 Geo Prizm Base
90 day: 32.42 mpg (US)
Thanks: 2
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by arcosine View Post
MPG should be inversely proportional to MPH.
No. Sure there is twice as much wind resistance at 30 mph than there is at 60mph - it's a square law. But MPG isn't based solely on wind resistance, another important consideration is how efficient the engine is working. I got my best tank going 75-85 on california freeways.

Inversely proportion isn't quite the right mathematical wording to describe the relationship because, again, it's a square law.
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1988 rx7 convertible. Streetported, racing beat header and presilencer replacing all 3 catalytic converters. Atkins 6 port sleeves. K&N cone filter intake. 22mpg average, 27mpg max. Spreadsheet (updated regularly):
https://dl.dropbox.com/u/5310442/198...%20mileage.xls
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