thanks mate, i did read about people doing that and i just shook my head.... but hey if it works for them , there is no way i would do that to my "76 yamaha dt" but i was just mostly concernd crap oil might shorten engine life. i know the diference between marine TCW3 and standard oil , the marine stuff is ment to burn much cooler, but yeh i read about people useing that for years to with no probs too "i supose you just cant kill an old victa" but from experiance and on another topic i hope others might benafit from this i used old boat fuel in an old talon wipper sniper once caus it was i had lying around and it totaly screwed the carbi cloged it up like crap within 2 minets had to re kit it cheers