welcome 2 the group I have used red off road fuel oil in rams for years even in my mb 300sdl never added nothing with the eco u have a lot more to worry about other than jelling
welcome 2 the g group knowing eco diesels at 90.000 the truck is about4/5 used up many last a bit longer if u r lucky pull a car fax and get the history of the truck
there is a diesel shop in Canada selling a tune that is like gde check om the Canadian forums they all use them plus it is a little cheaper I posted on here a while back