I got some fuel for my boat last year, and stored it in 2 25 liter metal tanks. Just mixed gas and oil, no conditioner. This year, my 75HP doesnt run well with this gas at all... Is the gas bad? How can I tell...<br /><br />If gas goes bad after 1 year for my boat, why does my car that sat for 7 years still run on the gas that was in its tank? Also, my 4HP works fine on this gas as well...<br /><br />Thanks for any advice/help i can get.