I'm using Amsoil Serier 2000 Full Synthetic Race oil Works well. My buddy uses it and the SOB runs his Huskys at 100/1 Oil ratio. Seems super bad for the saws, but he cuts a LOT of wood and has never had a motor failure. He compared the saws on 50/1 Husky oil, and 100/1 Amsoil mix and he swears the saws gain a couple hundred RPMs and make more power and most importantely they don't stink! :biggrinbounce2:
I've seen and felt the cylinders in his saws, and they're in excellent condition and his saws have at least 5-7 years of running on this oil mix!
I''ll never run mine more than 50/1, so I'm NOT saying to do what my buddy does with his 100/1 ratios. :hmm3grin2orange: