Every time I do a deep dive into mix oils I come away more confused than enlightened. Base stocks, additives, synthetic, semisynthetic, ester based etc. In reality besides having a base of ester or synthetic otherwise so called top tier oils are probably all similar in their quality. From a layman’s standpoint when I mix Motul or amsoil I put the ratio I want in a ratio container and pour it in the gas jug & have to pour gas back into the ratio container several times to get all the oil. Very thick but finally mixes well. Does this provide better lubricity for the piston, jug bearings it would seem so as opposed to Stihl ultra or husky which seems very thin when pouring into gas. Is this right? I don’t know. Back when I cut six days a week for Columbia Helicopters I ran ported huskys (385 390’s) hard then switched back to Stihl (660) I ran husky oil in huskys I ran Stihl oil in the 660’s. Never had a failure back then with those mix oils & I haven’t had a failure with the Motul or amsoil etc. it’s only when I got an iPad about 2013 did I even think about mix oils. Back then the guys I worked with all stayed in campgrounds & in the evening we all would grind chain and talk about the strip we were cutting or huntin , fishing, football women etc. we all ran hopped up saws and I don’t remember ever talking about mix oils. I’m dazed and confused about what is best! Sorry for rambling.