guys sorry po for my late reply, ganun pa din po van ko tuwing umaga. Now to answer your post one by one:
1.) Make and Model - 4m40 / '96 Spacegear 4wd 80k mileage
2.) Napansin ko lang na may parang film ng oil sa exhaust manifold connecting dun sa engine block, pero di naman nagbabawas.
3.) May nagsabi sa akin na mechanic na baka daw nozzle tip, but not sure ako dun.
4.) Pwede yung sinabi ni dieseldude pero 80k pa lang yung van ko and wala kong ibang problems except for that cold start with white smoke.

eto pa, pag start nanginginig yung engine pero after 30 to 40 seconds eh ok na yung tining (tunog) nung makina, naisip ko baka fuel filter though nakabili na ko di ko pa napapalitan, pero nagtataka ko bakit me white smoke as in white (hindi blue) and tuwing lumalamig lang sya nagkakaganun?

yung air filter ko may breather na nakakabit from the engine cover, napansin ko may oil film is this normal? Kelangan ko na yata magpalit ng air filter to isolate it one at a time. Please continue to pour in your comments mga peeps! thanks!