2021 Engine Coolant Requirement

[lawingnutz]

What brand of engine coolant should i add to my 2021 Jayco Seneca?
The label under the hood says to only add Nitrite-Free OAT Extended Life Coolant.
I’ve never heard of this type of antifreeze coolant.

[TWP723]

Is it a Cummins? I know they take that new orange OAT stuff. If so, I'd only use Mopar coolant.

[lawingnutz]

Yes it is a Cummins.

[16WhiteColly]

Nothing but they recommend, on a Cummins. Expensive but you will be glad you used it. If not, you will wish you had.

[TWP723]

Originally Posted by lawingnutz

Yes it is a Cummins.

Use the Cummins OAT AF only.

[EA37TS]

According to Cummins today.

Use whatever coolant the chassis manufacturer put in the engine when it was installed. Cummins engines are not shipped to Freightliner with coolant or belts.

Also, do not mix coolants.

[Shokyle1]

All peterbilts with cummins are filled with TRP red extended life coolant. I suspect you could go into any freightliner and get a gallon of what ever they fill it with from the factory.