[Balding_Eagle]

Only buy or fill up your car or truck in the early morning when the ground temperature is still cold.

Whoever wrote this is full of the stupids.Ground temperature is very steady, and so is the fuel in the tank.

Waste of time to read further.

[Freeper]

#18 "Whoever wrote this is full of the stupids.Ground temperature is very steady, and so is the fuel in the tank. "

True. Here in North Carolina the ground temp STAYS about 55 degrees when you get 8 to 15 inches underground ALL YEAR ROUND. Some of the formulas above (they are correct for the numbers they use but they) are not real world. Ground temp does not daily change 20 degrees.