^6.7 CGI oil question

[RWeatherbee]

Ram and cummins recomend 10W30 above 0. my question is it suppose to be standard oil or synthetic. The 5W40 is bold that you use synthetic. I have no link that the 10W30 can be synthetic. Shell makes a 10W30 T5 synthetic CK4 oil.

 

[AH64ID]

It can be synthetic or non-synthetic, thou I can't think of any 10w-30 diesel oil that isn't at least a synthetic blend.

On the flip side you won't find a 5w-40 that isn't a synthetic.

 

[RWeatherbee]

Thanks that would have been my thought, just wondered why that didn't give you a choice. This is the first oil change on my 2019 (5000 miles), things were easier on the 2005.

 

[AH64ID]

Thanks that would have been my thought, just wondered why that didn't give you a choice. This is the first oil change on my 2019 (5000 miles), things were easier on the 2005.

First change period, or first change for you?