Toyota Diesel forklift, white smoke at idle. All else good.

Fork was recently acquired. Seems to run excellent everywhere. Idles good, good power, revs up good, etc. However, we have whitish smoke mostly at idle or that is when it is most noticeable. I notice a slight miss when it first fires but gets leveled out in maybe 20sec. Engine has 5000ish hours and has obvious blowby but not like an OMG rooster shooting out. We changed out the fuel because it smelled strange and figured either the fuel was really bad or someone juiced it up with crap....

Toyota Diesel forklift, white smoke at idle. All else good.

Toyota Diesel forklift, white smoke at idle. All else good.