DOn't stress if you can't get the mobil 2T....
Any Fine Motocross racing syn. oil should work out well..... Bell Ray or Honda for ex......

pe reivers Knows these engines quite well.....
I would take his information on breaking these engines in and what kinds of oil to use as the Handbook Bible.

The whole petro/ vs\ syn for break in is really a manufacture choice...
Almost as heated as the 3W vrs. DA!.....
Pepsi VS Coke..... ect...

I personally think it's fantastic that it can use the syn. right away, as I will obviously be much slicker (keeps the engine looking knew inside)
and very minimal fouling... Unlike the petro based oils, which can leave varnish on the piston top even after 1-tank of gas..... during break in....