It's my work truck. 06 with 185k miles now but it has done this for a long time…. It doesn't always smoke but sometimes when I lean into the throttle to pass on the highway it will smoke a stream like a train- grayish black. It's even worse when I floor it. But it doesn't always do it…sometimes I can drive it the same way and have a light haze. The balance rates are good. It runs and starts perfectly fine. The only thing I feel might be off is it feels like my 05 LLY before I did the LBZ turbo inlet… turbo lag bad when WOT. I had a Diablo Predator programmer on it to help mileage but the smoke was even worse then. It's embarrassing to drive and I'd like to get this resolved somehow. No codes.