56ram2500
Well-Known Member
Amsoil 10w30 DTT compared to 5w40 DEONever experienced that issue on mine, and it’s had 10w30 in the sump since the first oil change. 3 years and 53k on it now, and oil changed every 10k. Our winters usually see lows in the teens, with some occasional single digits. Zero valve train noise at any point. What brand of 10w30 were you using?