Still trying to pick a good 2-stroke oil to meet my needs. This looks to be a good one but is it ok for the oil/gas mixture to sit in gas tank for extended periods of time? (3 wheeler will sit for months at a time). Does it have anti-corrosion additives? orignally I bought klotz supertechniplate but than found out you can't let it sit in the 3 wheeler or it can rust the tank/engine.