Had some time this afternoon, so for kicks I checked the HPFP cam follower. GTI '07 with 10,000 miles. Cam surface looks fine (I also verified that I had the B-version intake cam). Follower still has the black, surface-treatment coating and the inside was not bad either. Plunger looked fine. I was surprised by the smallness of the opening on the bamboo fitting (fuel inlet), but gasoline does have low viscosity. [I've been using Mobil1 0W-40 ever since it came home from the dealer (30 miles).]