That's good info. Steve,and all I'm sayin' is you can substitute 20w in cold weather.It actually is better for the `ped to do this if it's parked in the cold..Easier on starter mechanism,you know.But if you wanna run straight 30w and you have a heated garage and don't park it all day in the cold it would be o.k.,I guess.Oh,and that's probably old info. on the mix ratio.The recent oils will usually run fine at 40:1.The old 2-cycle oil needed a heavier ratio.I run 40:1 or a little less and have no problems with Pennzoil Marine synthetic from Wal-Mart.