People just don't understand me. Listen. Less EROEI is as bad as it gets, but please, don't count it twice. A Truck that was built with a EROEI petrol of 100 will use the same energy than a truck built with a EROEI petrol of 50, 30 or 20. That's not the issue with EROEI at all. You're confusing stuff. You're saying that a truck spends the energy it requires PLUS the energy that the pumps and refineries require to function. But those are different things. The problem is how much energy does the production of ENERGY takes out of the system. If you subtract them, there's your real energy output for the society.

It appears that what you are saying amounts to the same thing.

Well it almost would if I wasn't wrong saying what I said. The thing is, a truck spends 10 energy cubes. Imagine. You have 1000 energy cubes produced. You could have built 100 trucks. But to build those energy cubes, you required 10 energy cubes (EROEI = 100), so you can only build 99 trucks with what is left (990 cubes). If EROEI = 50, then a truck won't cost you 20cubes, but still only 10. It's the energy cost that doubled. That means that for producing 1000 energy cubes, you spent 20 cubes. That leaves 980 cubes, which goes to produce 98 trucks. Like someone above said, this doesn't have much influence until it reaches values much closer to 1 (where it reaches infinity).

But get this: the truck ALWAYS costs 10 energy cubes. Not 2X it. That's different. That's WAY different.

Okay?