You’re doing it wrong. You gotta cut cookies and tear it down every 5 cuts and then report on how well your magic oil is working and how bad Stihl oil is.
Take what you read in oil threads with a grain of salt. Lots of assumptions, opinions, guesstimates, and BS. There is over 1000 pages between 2 forums and they’re still chasing their tail.
I just had to lengthen the adjuster hole toward the tip so i could slide the bar back some to make up the DL difference. Echo is 45 DL and Stihl is 44. It took about 5 minutes with a Dremel
If you take out a DL it will fit right on.