MPG? WTF that's for plebian commuter cars. Don't you mean GPM?
Before starting a track session I don't want to fill the tank completely as a result of the added unnecessary weight, so I update my GPM (gallons per mile) calculation so I add enough gas not to run out during my session.
Daily: 2013 e92 M3 DCT / ESS VT2 650 S/C / Akrapovic Evolution / StopTech BBK
Track/Airstrip: 2011 997.2 Turbo S PDK / GIAC FBO @ 30psi / BBi suspension build
Beaterz: 2013 X5 3.5 Sport, 2015 Wrangler Unlimited
YouTube Channel: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w