1997 Mazda 626 2 liter 5 speed smokes right after its started and quits when fully warmed up. It is oil smoke and it just started doing this right out of the blue. I have just changed the EGR valve and spark plugs. Is this valve stem seals, rings or EGR system. I need some tech support on this one. Thanks !!!!!!! P.S. 158,000 miles

 

Sounds like valve stem seals, but really should only give a little smoke until the excess oil is burnt out of the cylinders