Originally Posted By: bubbatime
You are not doing your equipment any favors running more oil than called for by the manufacturer. More oil equals more carbon, which destroys cylinders and lowers compression.
Running top quality like Stihl, Echo, Amsoil oil 50:1 in all 2 stroke equipment (chainsaws, trimmers, blowers) will improve their lifespan over 16:1, 32:1 ratios.
While the type of oil chosen does affect carbon buildup in the combustion chamber and in the exhaust, the carbon buildup situation is often counter intuitive. In other words, the use of more oil often results in fewer hard carbon deposits in all areas.
Our racing engines run at 16 to 1 were often completely carbon free! Contrast that to guys running 100 to 1, with very hard carbon deposits, less power and more wear.
An older but interesting test:
http://www.wdarc.org/articles_files/2 stroke Oil Test.pdf
Some interesting quotes from the above test: "I would never use Amsoil100:1 mixed at 100:1. There is no decrease of carbon formation and I noticed an increase of piston scuffing on the test engine"