Hi, well typically the longer a car sets. The more it will smoke if valve seals are bad. However if the car is driven everyday then it should smoke every day. So this leads me to believe you may have a prob with a head gasket.A head gasket may leak, and cause smoke periodically according to temperature.
If this is the case, it may be very hard to diag. It can be tested with an engine scope, and a probe inserted in the radiator. This test for carbon monoxide. Or exhaust leaking into the cooling system. But this equiptment is expensive and usually only avail at the bigger shops.
However this is no guarantee it will be found. What you have is the onset of a prob that will certainly get worse. When it get, s worse it will be easier to diag.
If this was my car, I think I would wait and let it get worse. Rather then spend a bunch of diag hours.
Anywhere their is smoke it has to be burning on a spark plug one plug will be burning diff from the others. This is the cyl that will have the prob.
And as far as the oil not likely this is the cause. But a quick solution is have the oil changed and demand the type oil that your mfg reccomends. Good luck and thanks for writeing billymac
Sunday, April 12th, 2009 AT 7:34 PM