When my trucks puts out smoke.....

[Got Diesel?]

When my truck puts out the smoke its not always 100%percent black. its usually black with a little blue. i checkthe oil regularly and the tuck doesnt burn any oil. any body know why i see the blue smoke mixed in with the black

[HunterJ]

I get that too sometimes. It could be caused by where you fill up at some places are wierd. Like a old suburban i had when i used shell gas the engine would ping and would be more sluggish.

for more solutions

[Banshee34]

Wonder if it could have something to do with ULSD ?

[SCUFFY828]

if your not using any oil dont sweat it

[95dieselsmoke]

Originally Posted by SCUFFY828

if your not using any oil dont sweat it

scuffy, doesnt blue smoke mean bad fuel injector orings? mine was blowing a bit of blue when i first bought it,(along with horrible MPG's) Ford replaced the orings and all is better now.

[HunterJ]

Originally Posted by 95dieselsmoke

scuffy, doesnt blue smoke mean bad fuel injector orings? mine was blowing a bit of blue when i first bought it,(along with horrible MPG's) Ford replaced the orings and all is better now.

I have good mpgs and it only does it sometime not all the time. How about yours?

[benderado]

Originally Posted by 95dieselsmoke

scuffy, doesnt blue smoke mean bad fuel injector orings? mine was blowing a bit of blue when i first bought it,(along with horrible MPG's) Ford replaced the orings and all is better now.

Blue smoke generally means that oil is entering your combustion chamber. That could be blow-by caused from worn rings, high crankcase pressure, injector o-rings, the list goes on.