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I’m in Houston, TX and in TX people frequent 75-80mph all day long. These are obviously US gal so mileage will be different but what mpg are you getting with the gas version and can you clarify which gallon? Dumb question but is the US gallon only in the US or does it have some international...

Which side is best for an awing? "left" and "right" answers won't help, but "driver side" or "passenger side" are much appreciated. ;) Type of (planned) awning (batwing, straight) is of course important. The reasons for the preferred side are also interesting.