Quote:
Originally Posted by Sven7
EPA didn't test cars before 1984 so yeah, the estimates will be off. I divide 300 (the normal range for a car) by the tank size in gallons to figure out the manufacturer's approximate MPG estimate.
My 1965 truck has a ~20 gallon tank, so that would peg it at ~15mpg, which is correct.
My Rabbit has a 10.5 gallon tank which would put it at ~29mpg, about right on 87 octane.
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You can get numbers back to 1978.
Download Fuel Economy Data
This a reply I got on another site in regards to my '81 Datsun ratings from there.
"An approximate conversion... 22.5mpg CAFE=17mpg 2008 estimates, 20.5mpg CAFE=15mpg 2008 estimates, and 26mpg CAFE=19mpg 2008 estimates. So I guess using the 2008 estimates, your car is rated at 15mpg city, 19mpg hwy and 17mpg combined. "
Is this conversion (old ratings multiplied by 0.75) reasonable?
Sven7, your method gives a result of 14mpg for my Datsun, 20% lower than the 17mpg above.
