I've read that some of you have accidentally run out of fuel (gas) .
What happens to the ICE (engine) in these conditions - does it open all its valves and present no load or is it still trying to burn nothing - firing sparks etc

Also I know if you run low on gas in a saab 9-3 it tells you the optimum speed to drive to reach the gas station - and it's quite a high speed 40-50mph.

Is there an optimum speed to drive an IMA with no fuel??

My first post