Just a thought, when I use a fuel can, I find that what I'm guzzling through isn't my supply of fuels... it's my supply of tin, which I need for making bronze, for alloys, for reinforced stuff to build big high tech buildings/nuclear plants/weapon test sites out of. This really puts a damper on my fossil fuel use (I often have piles of coal dust and wind up inefficiently burning coal straight as is).
In reality, when someone uses a gas can, they don't throw the can away, and it doesn't make sense for the can itself to be burned, so why do we lose our cans when we use them?
It might make more sense to make gas cans craftable and work like a bucket. A can could be crafted by 8 tin, with the one missing one being in the upper left corner. Then, to compensate for balance, perhaps each can would be filled to clumpiness with 4, 6, or maybe 8 clumps, surrounding the empty can. When a fuel can is used, we get back empty cans. This way we make a one time investment on tin and actually guzzle our fuel when we guzzle fuel. The empty can sprite could just be a greyscale version of the cans we already have.
Thanks for reading this either way, just thought I'd share.