My 2015 diesel supplement says I have OAT coolant. It also says not to mix with HOAT. I do not think I have HOAT in my 2015 Ram!!! I hate when people just put out info off the top of their head, rather than what manual says.
Hmmmm. I am in south texas. Think we had two days last year it got into thirties. How cold does it have to be to get this DEF heater to operate. If it is below freezing I probably won't leave the house anyway. Do you know what temp DEF freezes.
Yep!!!
We recommend you use 5W-40 synthetic engine oil such
as MOPAR or Shell Rotella that meets FCA Material
Standard MS-10902 and the API CJ-4 or ACEA E9/E7 or
ACEA A3/B4 engine oil category is required.