Well, I think I may have a thought or two. When I start up in the morning there is NO ticking, Only when the engine seems to warm up or I drive it for awhile. Also it stops and starts ticking throughout the day, cant really see a pattern. Could this possibly be a valve sticking? Other than that, I changed oil with Mobil 1 Full synthetic 0W40 and it seems to do it less then running 10W40, so my second thought is possibly the oil pump. Any other Ideas? Thanks