What is the gas to oil mix in a John Deere cs62 chainsaw?

mix it as can of oil says.they say 25 to 1 others 50 to 1 there oil whatever i mix my oils for all my saws around 35 to 1.i have not burn one up and i run 7 saws.one of them i still use is 30 years old with original piston and rings.