I have a 2019 f150 XLT with the 5.0 . I have the deceleration rattle from the cam phasers when the engine is cold. I run 5-20 Amsoil signature series oil and am concerned about long term durability of this engine. Do I have anything to worry about? My service tech and the dealership owner both say I can run 5-30 and that may help. Does this sound legit? My truck only has 6000 miles on it so I am skeptical to use anything other than what the mfg. calls for at least under warranty. I am no mechanic so would like some help with this if possible. Thanks in advance.