Smokes at high rpms

[KGS]

I tried a search, but got nothing. My 2002 DMax smokes at 2400rpms and up, empty or loaded. Air filter didn't make a difference, stock vs Amsoil. Am going to try some fuel additive. Smoke is brownish grey, normal???

Thanks, Kurt

[MaxACL]

Kurt,

I too have noticed a smoke but only while accelerating hard on an engine that (perhaps) hadn