I found some "oil cans" that appear identical to regular MFCs (US Mil plastic type, not NATO). I have never seen an "oil can" like these and think it is a regular MFC, mislabeled by the guy selling them. Any idea if there is a 5 gallon oil can that looks like an MFC? If it is an oil can, would it still work for gas storage with a Viton gasket added? The screw on unleaded nozzle fits them, and they are only $8. Thanks for shedding any light on these.