A quick question while we are putting all these older AFVs back into service. Where is all the gas (or if its European, diesel) coming from? An M4 Sherman (indeed most WW2 AFVs from the US) use older gas engines. These had points, carbs and floats that would have to be changed to enable the use of ethanol (methanol won't work in these older engines). Who's fabricating the new piston rings, bucket tappets, and lifter springs that will be needed to withstand the higher burn temps of ethanol? There is this idea out there that all of these older vehicles are "plug and play" with alternative fuels just like the newer "FlexFuel" cars mandated in the US today. Nothing could be further from the truth. In fact, the major reason the US didn't switch to ethanol or a gas/ethanol mixture during the Oil Crisis was the inability of older gas engines to use ethanol without damage. I remember the old jeeps and gamma-goats; They wouldn't run properly if there was too much water in the gas.
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