Stink and Smoke On Start UP

[Mountain Outy]

Hey gents have a 2006 Silverado 2500hd 6.0 liter with 168000 kms. Just changed the oil and now first thing in the morning she smokes ( white ) and stinks like a burnt match! It lingers like a fog mist. Crazy. It has no sweet antifreeze smell and no oil smell, kinda sulphur smell. What gives?

[newdude]

Is the smoke out the tailpipe or the engine?

[Mountain Outy]

Tail pipe

[newdude]

Is the new oil clean and filled to the proper level? How's the coolant level as well in the tank? Odd that it started right after you oil changed it. Any thick fog/smoke prior to that?

[Mountain Outy]

Oil topped up, looks relatively clean, not perfect, coolant level is good, its the smell I cant get over too weird, then this morning it didnt do it been dooing it for weeks? Too weird.

[sdeeter19555]

Did you just fill the gas tank? Sounds like you got a batch of off spec fuel.