I have an old McCullough chainsaw that sat in my barn for about 8 years. I recently got it out and poured about 3 tablespoons of seafoam in it, pulled the starter rope 4 or 5 times went and ate lunch came back, poured 40 to 1 gas in it chocked it a time or 2 and it fired up and I have been cutting wood with it ever since. I was down to my last half can and bought 2 more cans at Atwoods today. wouldn't be without it. Use it every thing that has a motor, gas or diesel. Thanks, Speedy2