2002 Camry drives well with 150k on the original engine. Its my daughters car and she is due to make a big trip so I am giving it the dad DIY once over. Found a very clogged PCV, and when I removed the oil fill cap, found thick chunky sludge. Confirmed that it was in fact sludge with my auto parts friends. Looking for some suggestions as how to proceed with the sludge issue... Do I use an engine cleaner? Seafoam ? Kerosene? Most everything else with the car is in solid shape, dont want to scrap it. Anyone with experience please reply. FYI, this is my first post on this site, Thanks!!