I have been helping my friend get his 2800cs back alive. We recently got it finally running (2 plug wires were in the wrong orientation), so we were pretty happy to get it running on all 6. He replaced the normal wear items (cap, rotor, plugs, etc). The car apparently had sat for 10 years. He had his tank boiled and sealed to be sure his gas supply was clean. We then sucked through a vacuum line water and later sea foam for about 30 minutes. He then dumped about half a quart of atf into the crank case. Since then he has run the car for an hour. It still has white smoke coming out of the tail pipe. Are his rings shot? The white smoke does not seem to be dissipating with more run time.