Currently running Amsoil Saber at 3oz/gallon ethanol free in all the chainsaws.Wish red Armor was a little cheaper.I feel tuning is a little more precise with the Saber.
Don't remember oil filters, not the cheapest however.Back then I ran a lot of 20-50 Castrol, LOL. 22R is a tough little engine and I never pushed them too hard.
Jolting with some kind of impact device usually works well.That and tools with very little flex.Amazing the effectiveness of impact sockets over regular sockets.Congrats.
Had a friend yrs ago blew up his 1971 (I recollect) Olds 442 engine (don't remember exactly what went first) I remember he overfilled it by several quarts, Car was absolutely mint, lol.
Ranger 2003, 2.3 Duratec 221,000 miles.All original except water pump, mass air sensor,throttle position sensor. Expedition 2003 4.6 2 valve. 266,000 miles. Expedition original everything except intake manifold gasket and 5 coil packs.