2011 Chevy 1500 4.8 vortec, I've been maintaining it since its had 40k miles and it now has 139k. I usually use Napa Gold, Fram Tough Guard or Ultra filters. It has always had a ticking sound from what seems like the bottom end for as long as I've been servicing it. It does it when the engine is cold, or fully warm all the time, whether the oil was freshly changed or had 5k miles on it. It has never hurt anything, but its noticeable. I've always been hesitant to run Ecore filters on it, I never have. I heard that Ecore filters offer better flow. I changed the oil in it last week with some ST Dexos 5W30 and a TG filter, tick was till there. Yesterday it had about 200 miles on the oil since I changed it, I decided to pull the Fram off and put an AcDelco PF48E. I had my buddy start it the next morning when the engine was cold and it had absolutely no ticking sound, we let it run for a good 5 minutes. Could it be that the Ecore filter really solved the ticking problem and parts of the engine were getting reduced oil flow with the other filters?