Home heating oil tanks are cheap but usualy after a few years they have major sludge on the bottom. You would be better off with 55gal drums that held fuel, not oil there alot thinner.
How you store that container has alot to do with how the fuel keeps also. Sitting outside in the weather/sun is no good.
How you store that container has alot to do with how the fuel keeps also. Sitting outside in the weather/sun is no good.