When to Fuel

There goes a saying, that you should fuel when the climate is cool, since its generally cooler in the night then in the day, the volume of fuel you get for your money is more than what you would get if you fuel in the daytime instead, since its warmer in the day.

So u get slightly more fuel and a better mileage. Well as you can see in the pics above, a few petrol pumps have gone ahead and installed a display which shows the density of fuel. However in theory, you will get slightly more fuel when the temperature is cooler, but in practice, it doesn't work that way as most gas tanks are buried in the ground, and the fuel is insulated well enough that it won't change temperature noticeably over the course of the day or night. So tank up whenever you feel like, cool or not, it wont make a difference, unless there is large temperature variation between day and night.