- Pump up your tires to max sidewall
- change good oils to your car engine and transmission 0W is the best for engine.
- DWB
- P&G
- ligthen up your car
- Bellypan
- rear wheel skirts
- other aero mods
- Scangauge
- Choose your "tank" max speed limit (and stick to it
) and see how it affects to your tank consumtion.
I noticed that when already driven 900 km in a tank and the consumtion was 3.0l/100km my max trip cruising speed was 65 mph. When I drove 75kilometers at the speed of 125-130 km/h the tank sonsumption rose to 3.2 l/100km and only in that short distance and that long distance already driven!.
So the point is that you can ruin your tank consumtion in very short period of "high" speed driving.