Isn't shaffers POA oil, just like Amsoil, RP, etc????
It's all from the same barrel...... LOL
I reccomend tech2000 walm mart oil, 0w20.......... Save you some power it's so thin, and you can change it before is sludges because it's so cheap!
LOL
I use Amsoil 15W40 Diesel/Marine, been using it since, uhm, OK, dads been using it since..... I was like 5.......
Ran it in a little Suzuki 4wheeler I git when I was 7, turned the 10K mile odometer over four times... ran like new.
Never actually had anything wear out running it.....
Not sure how you guys can sleep at night putting thin oil in these things tho...... ugh.
Now, for the next guy and his favorite oil.....