The valley area on my 87 305 was nasty when I pulled the intake off a couple of years ago, but nothing as bad as the picture. I would call it clean compared to the picture. It had nothing but Quaker State 10w30 @ 3mo/3,000mi OCI's for the 12 years and 150,000 miles before I took the intake off. Not sure what the previous owner used for the first 40,000 miles