A little pre mix info I found

Synthetic oils, especially amsoil are amazing lubricants. I ran my blaster at 50:1 for 2 years beating the hell out of it, and 3 dune trips where it was running the whole time. When it was time to rebuild the rings were worn so much they were the exact size of the piston. Nothing else was wrong, and there was almost no carbon build up.

Keep in mind you should go leaner on your oil to fuel mix with synthetics because they dont need as much oil to lubricate as well as petro based oils. However when you mix in less oil you then actually richen your air/fuel ratio. Many times you can drop down a main jet size and possibly a clip or a half clip (washer).
 
Synthetic oils, especially amsoil are amazing lubricants. I ran my blaster at 50:1 for 2 years beating the hell out of it, and 3 dune trips where it was running the whole time. When it was time to rebuild the rings were worn so much they were the exact size of the piston. Nothing else was wrong, and there was almost no carbon build up.

Keep in mind you should go leaner on your oil to fuel mix with synthetics because they dont need as much oil to lubricate as well as petro based oils. However when you mix in less oil you then actually richen your air/fuel ratio. Many times you can drop down a main jet size and possibly a clip or a half clip (washer).

so, how many hours was it on the rings? 2 years sounds like it could've been a ton and more than regular or less than regular replacement for rings depending on how many hours they should be changed at and how many you logged? I'm looking at putting amsoil in my ltr for the regular 4 stroke oil :D but all the guys are using the 0w40... so I'm just not sure lol
 
the amsoil dominator calls for a 50:1 mix right on the bottle and also in an email straight from amsoil, it's formulatted to run at that ratio, so that wasnt really mixing it wrong