CEpp said:ive found it was oil. . and the exhaust probe was covered... checked leakdown on sunday night and everything checked ok. swapping out valve seals tonight or tommorrow night. i am going to pull off the exhaust manifold to see which cylinder is the cuplrit!!
I found out what it was


Removed exhaust manifold and # 6 exhaust valve was the cuplrit

So I replaced #6 exhaust valve seals and all is good

