I checked the valves in the White Whale yesterday. Valves and rockers and whatnot are looking good. Light varnish. The varnish is significantly heavier on the valve cover. There's even a little bit of goop on the far corners. It rubs off with a q-tip. To tell the truth, I was a bit surprised to find this. OMG! MOBIL 1 SLUDGED MY ENGINE!! I seem to remember the engine being just a little bit dirtier when I checked the valve lash a few years back. I'd recently bought the car and had been running M1 for a few months. (If that has any bearing on anything!) Wish I'd taken pictures at the time, but I wasn't yet a BITOG loony!