Just came out after a cold rainy day and started the truck as I was walking to it. I saw white smoke coming out tailpipe and the smell of burnt oil or oil. Didn't last long but should I be concerned? Only 20K and 18 months new.
No oil should be getting into your exhaust.
White smoke and smell of oil almost certainly means that there's oil vapour in the exhaust, so definitely get it checked out.
Have you been checking the engine oil level? Has it changed over time?
Head gasket failing?