Here's the first UOA that I've taken from my used 2015 Ram 1500 EcoDiesel. I ran the T6 0w40 over the winter months for 5.5k miles. I did a lot of remote starts in the mornings before work. I wouldn't say that where I live is extreme cold but it does snow here and drop below freezing sometimes.
I refilled with Mobil 1 Turbo Diesel Truck 5w40 CK-4 version.
I refilled with Mobil 1 Turbo Diesel Truck 5w40 CK-4 version.