04 4.8is blue smoke accellerating from a stop and sometimes at start-up??

[Estroil 4.8is]

My 4.8 with 94k miles puffs a cloud of blue smoke when accelerating from a stop and sometimes at start-up or reving the engine. I think its burn some oil as well. I just replaced the 2 crankcase vent valves and didn't see any difference. What are other items should I inspect or replace. Thanks for any help this is embarassing with such a mean looking machine.