Here's what one guy told me...
I usually run AmsOil @ 128:1 (and have often ran @ 150:1) I've been told that the AmsOil tests are done at 200:1 but not sure if that is true. I do know it will run all day long @ 150:1 - but try to convince anyone!
My Banshee is 565cc (550 Jet-Ski pistons on a 10 mil stroker crank) with good ol' cast iron custom-built sleeves. Coated cylinder walls are not for me. Hasn't been apart for 3 seasons! When I do disassemble it, there is always plenty of blue/green oil in the crankcase so I know everything's cool.
Jeff Robbins
"JJ and A Racing Products"
(503) 826-9402