I'm thinking I'm opening a can of worms here, but I've been waffelling about using synthetic oil in my Cummins. I'm due for an oil change and am wondering if I can get double the miles from synthetic as I get from Dino. Syn is running about double the price of Dino for a gallon at Wally. If nothing else I'd rather go 10k instead of the 5k schedule I'm on now. Have Syn in all the family gas engines and have had good experience with it. Use Mobil 1 in all of them. What do you guys think?
Thanks, Mike
It is more then likely you can easily go 10k miles on a good synthetic diesel oil. And to your point on cheap synthetic, well when it comes to diesel oil the monster oils like rotealla are not as good as they used to be on the stat sheet, but lesser oils such as delo or valvoline have increased their quality very much. And with the newest diesel specs ck4 a cheap synthetic oil is a great strategy.
Go to blackstone and get you a kit, they will send it to you free no obligation, when you fill it with oil you send it back with 38 dollar check because you need something called tbn, it is an extra ten bucks, so that tbn sets your interval or lets you know how the oil is at 10k miles.
When you get your uoa, you can upload without personal info using their software,
and post it here. We try to get comments that help people understand some features of their uoa.
More important then oil Mike is likely your filter selection, read the oil filter thread in my sig and use a spun microglass filters with that set up. Now, next level with diesels is to go to bypass filtration, extend oci but it is a costly venture as those filters are expensive. I spent a decade putting a million miles on a Cummins for work and had a Cummins ram as well, I'd just opt for spun microglass, royal purple filter would be my choice. Not the oil though, just their filters.