I recently read an article in the latest RACQ Road Ahead which mentioned the following tips to use next time when filling up, so incase anyone hasn't heard these before, give them a go:
1] Re-fuel in the morning - filling up when fuel in the station's holding tanks is cool means the fuel hasn't expanded due to heat, meaning the fuel being pumped into your tank is denser.
2] Re-fuelling when the car's tank is no more than half empty - this will mean there is less air in your car's tank which means less room for fuel vapours to fill the tank.
3] Don't re-fuel if you see a tanker filling the station's holding tanks - when tankers fill the holding tanks the incoming fuel stirs up vapours which means the pump is most likely to be pumping fuel vapour and less fuel aswel as any deposits which can build up in holding tanks.
4] Use the slowest setting on the nozzle - slowing the pump down will pump more fuel and less vapour into your tank.
(Ive tried this and it does take awhile to fill the tank. Remember there's no time limit at the bowser.)
Let's give these a go and report back the findings.
Anything we can do to get the most value when it comes to fuel is worth a shot.
Muz