Chainsaws run under quite different conditions to what a lot of these bike 2T oils were designed for. Don't forget when pre mixing oil it remains at the same ratio irrespective of what rpm/load situation is taking place. What l would like to see is OEM's work far more closely with oil company's to produce a quality synthetic/semi synthetic tailored to suit the specific requirements of modern saws. This would mean chemical engineers would test and really determine the best formula for the application. lf l as a consumer am expected to pay in many instances more than double or tripple the cost of conventional mineral base oils l want better than what is on the shelf today. l don't want to feel sick after breathing in sulphur contained in the additives after running a saw all day, going home with my eyes feeling like shrivelled sultanas...NO THANKS. And the price they command is hidious!! A industry saw user can easily pocket the savings using conventional oils to replace his saw yearly at minimum. Let alone having to worry about saws not in use attracting moisture corroding internals main bearings ect. Go to a Stihl dealer and get a quote on replacing crank bearings....not worth the risk. Actually quite stupid lMO. What about, loss of ring seal due to glazing that these synthetics cause....these are tested known fact! If using synthetics in saws that put food on your family's table why would you want an oil that results in power loss after prolonged use?? Once again get a quote at your local dealer for replacement of rings/piston. Most guys pay others to do this work as their trade is holding a saw. The negatives of these pricey, blow by promoting man made princess perfect molecules are just false economy and did l mention they stink. Look, synthetics have 'some' wonderful characteristics at high temperatures and in certain racing applications you would be stupid to use anything else, but we are talking chainsaws!lol Not the quarter mile or Baja! I challenge anyone to show the forum a failure directly related to any oil mineral/synthetic?? I mean a failure that can directly be blamed on the QUALITY of the oil, not no oil or not enough oil or a result of lean tune. Andy has been searching for a few days now and he has come up with zilch, maybe others can chime in and help him. But the rules are, you have to prove beyond reasonable doubt that XXXX oil caused the failure.