randal, you summed that up nicely.

I was also thinking a hand pallet jack would be the most efficient,,lol no really.
Luis, if its your employer that wants you to figure the fuel or energy cost on forklifts tell them that you need to visit other operations that are similiar to yours so you can do some research to find the information you are looking for. Maybe you can get a vacation out of it.

Thats the only way I can think that you will get accurate information.