[Vekke]

What is the best way to calculate tanks avg speed. SG II does it automatically, but it calculates the speed so that it doesnt give good impression of how fast you have travelled on highway. The problem is that avg speed starts to drop rapidly when driving in town.

So have you figured out good way to do it? In my opinion good way should be that after every long trip you write down the avg speed and the distances tarvelled. Then in next fillup do little math to calculate avg speed for highway driving...