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Originally Posted by psfred
Sixto:
Those would be Imperial gallons, 5 US quarts instead of 4 (because the Imperial Quart is 20 oz, not 16).
Multiply by 0.8 to get milage in US gallons, still pretty good.
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Peter,
The Imperial gallon is larger than the U.S. gallon. So, you can go further on an Imperial gallon. You therefore would multiply by 1.20 when you have the mileage in Imperial gallons and you wish to get the mileage in U.S. gallons.
With this conversion, his fuel economy really looks amazing.