Since you are not running a Ford Diesel engine, you can use any API approved CK4 or CK4/SN 15W40 diesel oil. It really doesn't matter as long as the oil has all the appropriate approvals for your engine(s). I would use whatever major or house brand conventional diesel oil that is the most cost effective. Given the rebates, Mobil Delvac 1300 Super is among the low cost diesel oil leaders. As stated earlier, Delvac 1300 Super is a dual CK4/SN approved diesel oil with a lower phosphorus level of 800PPM to meet the gasoline engine SN rating. In addition to Mobil, both Chevron and Valvoline offer dual rated CK4/SN diesel oils. It's my understanding that these oils make use on other nonmetallic additives to supplement the lower phosphorus levels to provide good wear protection.
Ford is the only manufacturer that I am aware of that has not approved the dual rated CK4/SN lower phosphorus diesel oils which raises the question: is it the oil or an issue with 6.7L Powerstroke engine design/metallurgy. To date, Ford has not provided sufficient data to make a clear determination.
Yes, pour point was obsoleted for CCS and MRV because it didn't properly represent cold temp performance.while all this pour point data is great, I've owned a durmax for probably 10 years now living in New England and you can hear the difference between 15W40 and 5w40 on a cold ( like 10 or below -13 C) morning. Not exactly scientific method but cold starts get a lot quieter a lot quicker with the 5w40 than they did with the 15w40 . It's been a few years since I ran 15w40 in the winter and maybe it's changed so YMMV
For sure. Like I said in my OP, Ive been running 5w-40 in old diesels for a long time. Early 2000s, I’d import Delvac 1 from Canada, since it was easier to get when I made trips up there… 5w-40 does make for good starts in the cold. Thing is, my use isn’t in the real cold. None of my diesels are must operate in all conditions DD vehicles. I run them when I want, and especially the Mercedes cars have no need to operate there.while all this pour point data is great, I've owned a durmax for probably 10 years now living in New England and you can hear the difference between 15W40 and 5w40 on a cold ( like 10 or below -13 C) morning. Not exactly scientific method but cold starts get a lot quieter a lot quicker with the 5w40 than they did with the 15w40 . It's been a few years since I ran 15w40 in the winter and maybe it's changed so YMMV
Close… I had bought a bunch of Delvac 1300 because of the rebates… but had some Kirkland 15w-40 and Delo 400. I had my oldest pick the bottle, and it was the nice blue color of the Delo bottle…We all know that for any "normal" OCI, there's no practical wear control differences in these lubes. So, we turn to alternative means of selecting a lube for John:
1) whatever is cheapest AT THE TIME OF PURCHASE, including any rebates available and/or associated costs
If condition 1 is at or nearly equal, then ...
2) whatever is easier to attain (which one is closest to your home or common route of travel)
If condition 2 is at or nearly equal, then ...
3) put a color photograph of the three choices outside, all equally distant from the sun. Which ever photo fades the least over a period of 7.675 weeks of duration will clearly indicate the "best" oil for the application .... But ONLY if there has been a minimum of .9477483 inces of rain accumulation, otherwise the fade test is invalidated.
if the fade test fails to find a "winner", then you must induce the "spouse chooses the most attractive label" mantra; all sense of common logic is gone anyway, and so absurd delineation of the lubes is now warranted. Cuz it's Bitog, after all.
Be bold.Would a 10w40 E6 or CK-4 be on your radar? Only in Canada eh?
I bought 2 20L pails of Duron 10w40 CK-4 last year, still un-opened for a 2018 L5P Duramax.
That motor has been in service for over a decade and has been through two redesigns since their spec was introduced. It seems Ford has had plenty of opportunities to address any “design problems“ related to using a CK-4. I think the question to ask is what does Ford see that the other two in the segment don’t?It is more like a design problem with the Ford 6.7L Power Stroke engine since that was their first in-house design, not from International Navistar. Then FMC had to come up with their own motor oil spec requiring the old 1,000ppm level of ZDDP. That is Ford putting a shine on the sneaker to cover their engne durability issues. If you must align with the Ford spec then you cannot be a mixed fleet oil like Delvac 1300 Super is. The Delvac is SN rated for use in gas engines. That rules out the Rotella T3 for mixed fleet use. There is no reason to align with the Ford spec if not using a Ford diesel engine.
Uoa's from my old Peterbilt showed ST to be a great oil and a great value. How's that?Well… it’s because they’re all good. Like stated here:
Isn’t a bad philosophy. They’re all good, even the $22/3 gal (on sale) Kirkland HDEO.
Question is which and why? Cheapest is one option. Kirkland fits that bill. But it requires a Costco, and to buy three gallons (not necessarily an issue but just saying. So cheapest and hardest to get perhaps.
Rotella has been what I’ve generally gone with historically. I tended to find in the last that Delo seemed to return slightly lower fuel economy, but that was closing in on 20 years ago….
Formulated for the city of Edmonton which outside of Harbin, China, is probably the coldest city of a million people or more, on the planet.Never seen either of those.