synthetic's are the way to go! I've been using them since the early eightie's
oil and grease's
anyone notice more oil going over bearing when bi-tron was in the pan?
I've got a chain saw that is almost 30 years old and still running strong, it's only had syn. oil mix through it. 3 years falling timber, the rest is firewood cutting. Oh ya, they don't make the model any more, Sthl 076. Bought it in 1981 because I couldn't get my hands on a 090!
Amsoil is the only one I know still making 2 cycle, 100 to 1 syn oil. There were 3 back in the 80's.