Lazs, what have you been smoking:
"retro... How do I... me... "switch to a renewable source of fuel"??? You realize that oil is a renewable resource right? that it isn't dead dino's like your scientists told us in the not to distant past? What renewable source of fuel do you want me to tank up with? alcohol.. methanol... takes more oil to make a gallon of that stuff than it saves... "
It is only renewable if there is the equal (calibrated) amount of biomass of the right sort disappearing into the ground.
For that, you need a lot of wildland. Much more than we have today.
As for alcohol or methanol I can dig up the figures, but you're dead wrong.
I'll bring you some ineffective numbers from my rogue days as a brewer.
From 5 kg's of sugar you would get 20 ltrs of ca 12% brew. That's about 20.000 kcal turning into 2.5 ltr's clear alcohol, - ethanol calibrated as 90%+
20.000 kcal are some 12 kg's of Barley. A good field up here, in ICELAND, will give some 5 tonnes, - that is the energy of 412 times what you had in the bucket, or roughly 1.000 litres of clear ethanol.
That also leaves the straw, on a good field that would be 3-4 tonnes of burnable material, but you have to be insane to think that the combined energy to grow and harvest one ha of Barley tops 1,000 litres energy worth of 90% moon....
As for what counts into as minus, is the fertilizer, the seed, and the work.
The diesel you'd burn would perhaps be 50 litres. The fertilizer is 600 kg's, worth of an unknown part, but it can be found out, and then there is some energy cost for the machinery, but I doubt that one will pitch up against just the straw.
1000 vs 50 is what we have. And there comes the bone, barley is nothing good for maximum efficiency, Methanol gives a lot more than ethanol, and Iceland is NOT the place for macimum efficiency. In short, my numbers are but a friction of what can be done in other places.
What's in your head? What's wrong with an organic way of growing fuel for combustion engines? Because THAT is a renewable source, and NOT pumping out the fossile fuels of old.