I have used many different oils and brands trying to do what you guys in this thread. Some produce a dry residue and other oily residue, depending on the chainsaw, revolutions and compression also behave differently. I do not believe that an oil is the best in all cases, but I came to the conclusion that any oil fulfills its purpose, lubricate the engine, although if you find that with some type the engine gets more revolutions with the same percentage of oil and the same setting. Tested oils: motul 800, castrol tts, anova, husqvarna xp, stihl mineral, gro syn, echo, mannol, putoline and some that I forget because long ago this. In short my advice is to not forget to add oil and make the mixture approximately to a 45-1