Rules, I'm curious.

[Olefin]

I use the V1 rules but with a modification for ethanol fuel production as the data in the game doesnt hold up to real world ethanol performance versus gasoline.

In the game the amount of ethanol needed to power a vehicle is at a 3 to 1 ratio - but in reality Ethanol (E100) consumption in an engine is approximately 51% higher than for gasoline since the energy per unit volume of ethanol is 34% lower than for gasoline.

Meaning that it takes 1.5 liters of ethanol versus one liter of gasoline.

So for ethanol fuel I use a factor of 1.5 times as much instead of 3.0 for consumption of fuel compared to gasoline or diesel.