I have heard of it. I'm just very surprized that it would happen to such a young engine. My 01 4.4 has 138000 miles and burns no oil.

It does seam to be leaning towards stem seals. if the cat was blocked it should throw a code for cat efficiency.

you can try to clean the cat by pulling the O2 sensor upstream of the cat and spraying some Berryman's B 20 in the pipe.

__________________
0O(llll)(llll)O0
2007 Suzuki Vinson 500 4X4
2007 Toro 6.5hp
2006 BMW X5 4.4 ltr (his)
2001 BMW X5 4.4 ltr (hers)
1994 Honda XR650L
1984 Honda XR80

"Beer is proof that God loves us and wants us to be happy."
Benjamin Franklin