We use Maxima 927 in all our pre-mix (can't be used in injector systems) engines (outboard, PWC, Motocross). We have chosen this oil for several reasons 1) Wear has always been less than any same ratio synthetics or petroleums at tear down. 2) Flash temp is 480 compared to 240-290 with synthetics, meaning the oil will not begin to burn until 480 degrees 3) Has very good anti-corrosion additives for marine use as other castor based oils don't seem to be good in this area. 4) Is biodegradeable, yes tree huggers will thank you 5) Smells ooh so much better than anything else.
Last year in the 1liter modified inboard hydro class running a Yamaha GPR1200based engine turning 7500-8,200 rpm's, we ran 24:1 927 mix w/C16 all year with no teardowns. At the end of the season, we tore the engine down and the crankshaft had virtually no wear. We cleaned it up and put it back together with new pistons and sold the motor to our competition who shelved it so no one else would run it...he did win national high points this year.
For more info www.maximausa.com
Just my 2 cents
Trey
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