I know this has been covered many time but I found it a very intresting read none the less. Since Yamalube was one of the oils tested I thought you guys might be intrested. For those who don't want to read it all scroll down to the summary at the bottom.
Amsoil is my #2 could easily be my #1......either one is a win win.I've used nothing but Amsoil in the Warrior and the Road Star before it, as well as in my Nissan Pathfinder...I won't use anything else. In -40 c, the Pathfinder fires up without being plugged in at all. (and that was with summer oil too, 20-W50!!) The Warrior loves Amsoil too.[^]