Fuel Saving Tips

Cooler Fuel

I have found that filling up later in the evening or early in the morning increases mileage. I have seen a considerable decrease in MPGs when filling at midday to early evening. My theory it that has to do with the temperature of the fuel in the storage tank. The Sun beats down on the ground above the fuel storage tanks and that heat is transferred to the fuel causing it to expand. Cooler fuel will be more dense than warm fuel, giving you more energy per volume. Thus, waiting and filling on the way to work in the morning tomorrow is better than filling on the way home today.