Now that its warm I got smoke on startup after it sat about 20 hours with Rotella T syn 5w40.
No smoke when the motor is hot and if it sits for several hours. This is the first I have ever seen it smoke. I thought I had a non-smoking 80
I just changed the oil and now need to now change it again to either Rotella T 15w40 dino or 20w50 Chevron (if I can find it). I have used the Rotella syn for 7000 mi with no smoke.
Smoke on startup is from the valve seals, right?
If so can they be replaced without removing the head?
Does the swell sealer in oil work in valve seals? Should I leave the Rotella T syn in to see if it will swell the valve seals?
No smoke when the motor is hot and if it sits for several hours. This is the first I have ever seen it smoke. I thought I had a non-smoking 80

I just changed the oil and now need to now change it again to either Rotella T 15w40 dino or 20w50 Chevron (if I can find it). I have used the Rotella syn for 7000 mi with no smoke.
Smoke on startup is from the valve seals, right?
If so can they be replaced without removing the head?
Does the swell sealer in oil work in valve seals? Should I leave the Rotella T syn in to see if it will swell the valve seals?