Which oil to use?

[snopro]

i use coop xls synthetic 2 stroke oil..... 29.00 for a 4L.....

buddy has a 670 mod engine [ 740 ] with 7000 mountain miles on her...
and still going and never had a bearing go....

that says alot... i have been using it for 2 years.... good stuff

Co Op???? Sounds like a company just cashing in on the craze? I'll stay with a synthetic that has been around for awhile.