Or... just put mix oil/gas (2 cycle gas) into your current mower. I have an old Toro recycler and I don't go through my 2 cycle gas very quickly and I don't like throwing away old gas. Instead of buying fuel stabilizer, from time to time when it is time to go to the gas station and I need an empty 2 gallon can for mixing, I put the 50:1 mix into my Toro 21" 4 stroke recycler. That little bit of oil in the gas hasn't produced any smoke and it seems to run fine.
