Fill up early in the morning when the day's temperature is at its lowest. Fuel is denser when temperatures are cooler. Filling up when the air is cooler also reduces fuel evaporation.

When you are filling up, do not squeeze the trigger of the nozzle to a fast mode. If you are pumping on a fast rate, some of the fuel that goes to your tank becomes vapour. Pumping on low speed minimizes the vapours that are created.

Watch where you fill up. If there is a fuel tanker pumping into the storage tanks, steer clear of it. When the tanker fills fuel into the containers below the station, the sediment get stirred up. This sediment gets sucked into the vehicles that fill up first, and can cause a decrease in fuel efficiency.

Tighten the cap. Keep your fuel cap tight all the time when you are not filling up. Fuel will evaporate from the tank if it has an escape so make sure you twist the cap back.

Do not overfill or top off your vehicle tank. Overfilling results in sloshing over and out of tank. Never fill fuel past the first "click" of fuel nozzle. When you hear that first click of the fuel nozzle it’s time to stop.

While the savings may not amount to much each time you fill up, over time you should start to see a difference.