oil all comes down to about a million factors.. bearing quality.. oil quality.. how hard or light the saw gets used.. lab tests may say one oil is great.. but in real life that one oil may suck arse.. other oil that was bad in the lab may be awesome in real use.. then its down to metal types.. tolerances.. its a never ending battle like the stihl vs husky topics.. ford vs chevy.. its all about what the user uses. i swear by 32:1 mix of a motorcycle brand oil i usually keep to myself, and prem grade gas only.. that may not suit everybody.. its just my pref.