The truck started smoking blue the other day after a 3 hour trip. I picked up a buddies busted truck on the trailer and started heading home. I hit some traffic and whenever I had to stop and tske off again I would get a good cloud of blue. I dont have and smoke/steam coming out of the case breather or pressure out of the oil fill neck. Valve seals or rings.

 

oil burning in the cylinders. check yer oil lvl. could be head gasket or possibly cracked oil galley

 

It does use a little oil maybe a quart a month. anything to look for to lean me more towards one or the other.

 

probably a head gasket unless you blew the motor up