One wrench to throw in... In my case, I replaced a vehicle that that required premium fuel with one that takes regular... further increasing my savings. I definitely like the idea of having "replaced vehicle" option in the garage, but it still wouldn't be useful unless I could at least enter an average per gallon fuel price for the replaced vehicle (if the field is blank, use the current vehicle's average). This would probably be particularly useful for those that replace a gasoline vehicle with a diesel.
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