Dan, Is her Camry a V6?
My wife's 95 V6 Camry has 140,000 miles on it and has a slight sludge look when you look down the oil fill hole in the valve cover. I had the oil pan off 2 years ago and noticed it on the block walls too. Been using Castrol since day one. I wonder if this problem goes back to other year models too. The heat also interests me cause when I did the timing belt at 100k the cam seals were leaking. They had turned hard and brittle I suspect due to heat. The rear main has had a small leak for 3 years now and I suspect it too is brittle.
Very interesting indeed!
John R.
1992 525 IA, EAT chip, 16 x 7.5 Rondell 58's, BavAuto Springs, Bilstein Sports, Elipsoid Smileys & fogs, Z3 Pistol grip shifter, 4 VDO gauge package, Azure Blue w/nice patina - clearcoat shot