A little recent escapade. I've been running nothing but Mobil 1 5w30 (regular, not the extended performance trash) for all of the 65k this truck has on it. This past oil change I decided I would see if a changeup could quiet down the [censored] noisy lifters. So, I tried Mobil 1 ESP 0w30. The numbers on this indicate that it is slightly thicker and has a higher HT/HS. As an added plus, this oil is about 5 bucks a quart more expensive than the regular Mobil 1 which is readily available at Wal-Mart. Started the truck and did seem to observe higher oil pressures. However, the tick was still there. Went for a drive, came back, the tick was still there. So, the heck with it. I drained that stuff out and put good ole regular Mobil 1 back in. My last truck got Mobil 1 5w30, sold it with 186k on it and it showed ZERO signs of problems. So, I guess the tick is with me to stay and I'm going to stick with regular, Dexos approved Mobil 1.