I have a 2016 eco diesel I pull over 8’000 lbs had know trouble but keeping it under 70 mph was tough going up hills coming down hills I found out my had I exhaust break in it they usually don’t come with them. But it was great. It hold coming down hills. Mines a longhorn, Laramie edition...
Yes the 11.5 quarts of 5w-40 Full synthetic if you put 8.5 in it you y blow that diesel https://s3.amazonaws.com/chryslermedia.iconicweb.com/mediasite/specs/2021_RAM_1500_SPo67hu6voh18mm7gihlqgenf6cf.pdf
I use only Rotella 5w-40 Full synthetic yr around I live in Wisconsin and never had a problem we get temp below 0 out here even doing the day I would personally never use 5w-30 in my if I live down south I would use 15w-40 Rotella Full synthetic
Hi I’m from Wisconsin and I really like my truck I had up to 31.5 miles to a gallon and it still all factory stock I I average about 27 miles to the gallon I don’t know if it’s very good or not