2016 2500 5.7 with 110,000 miles. Engine sounds great; no tick (even cold starts). New PCV valve, oil catch can and I keep a close eye on the air filter. I run either PUP or RGT on 5K oil change interval. Experimented with OEM, WIX XP, Bosch, Fram Ultra, Mobil 1, Purolator Boss filters. Oil...