Blue Smoke @ Cold Start

[SDunkle600]

Hey Guys,

First of all, I want to thank you guys for all the awesome info. I have learned so much surfing this forum. I wish I would have found it sooner.

I am working on putting my signature together but in the meantime here are the specs on my truck: 2004.5 2500 4x4 quad cab short bed with the only mod being a Rokktech adj. timing sensor. I have noticed blue smoke coming from the exhaust when I start it after an extended period of time of sitting, like overnight. It puffs blue smoke for 5-10 seconds then quits. Once it is warmed up then shut down, as long as it is started within several hours, no smoke, but if it sits overnight, then it smokes. I changed the oil in 6K mile intervals and it only gets down half way through the cross-hatch on the dip stick by the time 6K miles roll around. It doesn't seem like it is using hardly any oil. I took it to the dealer twice and they couldn't replicate the problem. This is my first diesel and I need some guidance. Thanks in advance for your help!!