Car gets 0 MPG if it doesn't move. If you moved the car without using any gas then 0.00001 mile / 0 gal = undefined = unlimited MPGs, but you only moved 0.00001 mile. So technically if you just push your car a little bit, you will get unlimited MPGs, but not move that far. Take this as you will, but I wouldn't consider it worth the time. Getting 10 MPG moving 2 miles is much more worth it to me than getting unlimited and moving 0.00001 miles.
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