Have you guys ever used this product star*tron enzyme, i found it at northern on sale plus a rebate. It says it keeps gas for up to two years and treats all the gas. I have been using seafoam for years and have good luck with it, however I dont think it will keep gas fresh for two years like star tron says, not that I would want to. Just wondering since I store boats, atv's, sleds, motorcycles, lawn equipment and so on.. any thoughts would be great