Point is, ALL two stroke gassers have ball bearing cranks, needle bearing rods, plated aluminum cylinders...Any good two stroke non synthetic oil at 32 or 40-1 will be just fine...
Synthetic oils should be mixed at the oil manufacturer's recommendations..
There is nothing rubbing in the two stroke gasser except the bearing seals and piston rings, breaking in is making the rings seat to the cylinder...Bearings don't break in, they're good to go right from the start...Seals are neoprene, some might be tighter than others, so friction is less as the engine gets time on it...Heat cycling ? I guess, Tired Old Man has more documented time on two stroke gassers than almost anyone else on the planet, I believe what he says but all mine are set to run best right from the start...Never had an issue that was caused by not doing a prolonged break in...
The G62 uses a single 10mm fine thread bolt, it's tapped 5mm for a spinner, can be re tapped 10-32 for a Tru Turn...There is no grade marking on the 62 bolt, don't tap a metric grade 8.8, it's not strong enough...I THINK the 62 bolt is metric 12.9, same as our grade 8.
I deal in FACTS, but the above is just my 24 year dealing with two stroke gasser OPINION...
All you moderators can chime in with yours, seems to be a bunch of you guys here...