Fuel consumption

#1 I would have a fuel variable, set it at start and remove some when you accelerate or reverse (or while the cars running), thats the smple way ide do it, though my programming isnt the best, lol.
hope i could help.

#2 Then somehow disable the vehicle when it reaches zero.

#3 Well, I know the player has "runEnergyDrain", but I don't know about vehicles. If it does, this might be a good way of accomplishing you goal.

#4 That would be a very quick and easy way of doing it Ron, energy. Vehicles do feature energy that is drained when jetting (a turbo boost in a wheeled vehicle). It would be quite trivial to alter the energy system to drain on normal vehicle movement at whatever rate you desire. You'd also have to stop it from regenerating, which is its default behaviour although I believe this can be accomplished with a simple script value. There is a resource for a vehicle energy bar (it's pretty much identical to the player energy bar, altered for vehicles) - so the whole procedure should be quite quick and simple.

Let me know if you need any help. I have a wheeled vehicle that uses energy and would be happy to show you how it's set up if you don't already know.

#5 Well TIm since I have added a severely modified version of the vehicle engine and transmission resource, it isn't that simple. Thats kind of why I am more looking for a good formula.

#6 I set the recharge rate to a negative number. At idle, I set the value to something like -0.01, and to -0.9 when the gas is applied. Experimenting will get the values you like.

In OnAdd:

// energy use/gain   
   %obj.setEnergyLevel(%this.MaxEnergy);
   %obj.setRechargeRate(%this.rechargeRate);