^I concur...way too many variables could have caused the slight mpg increase, such as how the driver drove during that trip compared to the other two drives, if there was any winds to come up, and just the fact they did such a small amount of driving. A few trips with more miles and gallons being used would give a better account than just a few grams worth of fuel.
And even if it did work, well, we may do wacky things to our cars to get lots of MPG but even we have some dignity!
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