is the motor built for thinner oil? if not it's worth swapping in some with a thicker viscosity to see if that helps. easy to try before you get into oil pump changing.
neil.
Supposedly it's a pretty stock engine. I initially put 15W40 diesel oil in there, but then read here on FABO that it was not really ideal. When the engine is warmed up there's no noise at start-up. Correct me if I'm wrong, but doesn't oil get "thinner" the warmer it is?