Re: SAVE 5 miles per gallon......
Dennis - Just like Wikipedia does - I think I'll need to see some reference here to support your 75-80% claim. I'm not doubting your experience but some science reference would be nice.
My take - Since the tanks are underground i assume that the temperature is almost constant (especially here in FLA). The ground temp may increase/decrease as the seasons change but during one day the temp should not change from morning to afternoon.
Cleaner gas i can believe.
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