Smokes - Valve Seals?
When I start up my truck when it's cold it smokes pretty good for a couple of minutes. However, if it is a warm day it doesn't smoke at all. When I changed my plugs/wires/cap/rotor last week two of the 8 plugs had oil residue on them. They weren't soaked/wet but you could sure smell it and they were black not the faint brown they should be.
Could this be valve seals or some other problem?
Truck is a 1990 4x4 with 5.8L engine.