hello out there JJC Here. I am a 2018 Ram EcoDiesel owner.

[JJC]

I have bee using about a quart of oil every 3-4 weeks. and cannot find out why. another problem is I am in Colorado and cannot get Rotella T6 anywhere.
any ideas why the oil usage?

 

[Tremper126]

Check your antifreeze reservoir for signs of oil. The oil coolers when they fail will push oil into the cooling circuit.

 

[1shadowsabre]

There is a nationwide shortage of Rotella T6. you may be able to order online but might have to wait a bit!

 

[JJC]

Check your antifreeze reservoir for signs of oil. The oil coolers when they fail will push oil into the cooling circuit.

Thank you, the coolant looks good I will keep looking.

 

[BoostN]

Welcome to the forum @JJC !