[83bj60]

Originally Posted by Diesel_Boy

I should also mention that the low grade fuels we get here in NZ and the same with you guys in the US compared to the highend stuff they get in Japan has a big impact on the injection system.The blue smoke is a combination of low injection pressures (poor fuel atomisation), a direct injection engine, cool/cold out side air, cooler than optimum bore temperatures (engines not working hard so bore temps drop) and constant low rev running in low range.The blue smoke is unburnt diesel. Its smelly eye stinging smoke, not like the distinctive burnt oil smell

Wow, what a great explanation, the best I have read yet, and explains perfectly the faint bluish smoke I get when starting and after some idling when the engine is cold or cool...

Although my engine was burning Mobil1 during the first winter at an alarming rate (1l/5000km), it has burnt almost no oil at all (less than 1l for 15,000km!) when using synthetic Rotella and I still get that slight bluish oil puff thing when starting the engine and after extended idling!

Are you a forensic research investigator, Diesel_Boy? You've convinced me, Sherlock!