I have a small amount of white smoke on startup for about 1 min or so, temps are anywhere from 60-80 deg. Is any white smoke permissible on startup for healthy injectors? Milage isn't that bad depending on how i drive, 19 or so keeping my foot out of it to 15 on it(80 mi. commute). And I can't tell if it's running any rougher than normal, also oil level is OK. This is my first diesel but I've been driving fire engines/rescues for years and never seen white smoke, just black. 
