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#4367179 - 03/30/17 06:52 AM Which of the big three in 15W-40 CK4
atoalson Offline


Registered: 03/04/08
Posts: 61
Loc: Missouri
With all this talk of reduced zinc and phosphorous, but increased shear stability and other benefits, which of the big three brands is the standout leader? I'm referencing Delo 400, Delvac 1300 and Rotella T4, all 15W-40 flavors. I can't seem to find a PDS on rotella T4. Cummins says 15K OCI are fine, however I do mine at 10K miles since that mileage approaches a year interval and it's easier to keep track of. Current fill is Delvac 1300 CJ4. Needing to change the oil in the next several weeks. Thanks.
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#4367202 - 03/30/17 07:27 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
Bighorn2500 Offline


Registered: 05/24/16
Posts: 313
Loc: Michigan, USA
Originally Posted By: atoalson
With all this talk of reduced zinc and phosphorous, but increased shear stability and other benefits, which of the big three brands is the standout leader? I'm referencing Delo 400, Delvac 1300 and Rotella T4, all 15W-40 flavors. I can't seem to find a PDS on rotella T4. Cummins says 15K OCI are fine, however I do mine at 10K miles since that mileage approaches a year interval and it's easier to keep track of. Current fill is Delvac 1300 CJ4. Needing to change the oil in the next several weeks. Thanks.


IMO if you're changing every 10K, anyone of them will be fine. Lately I've leaned towards Delo and Mobil products as they can be easily found at Walmart with relatively good prices in the gallon jugs.

I still have six gallons CJ-4 of Mobil Delvac 1 5W40 in the garage from last May's rebate offer. By the time I run out of that stash Tom over at http://www.pqiamerica.com/ should have VOA's done on a majority of the CK-4 popular brands of 15w40.
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#4367245 - 03/30/17 08:35 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
Dak27 Offline


Registered: 05/18/10
Posts: 155
Loc: UT. USA
I believe Rotella still offers an SM rated 15W40. I'm not sure if Mobil Delvac does, but I know Chevron Delo's conventional CK-4 15W40 is an SN dual rated oil.

I'm a bit concerned about the lowered phosphorus in the SN rated HDEO's too. The Sales Rep. at my local Chevron Distributor has moved onto a different company. I was buying the CJ-4 oils from them at a really good price per case. I stopped in just yesterday to buy 3 more cases, but the new Sales Rep can't beat Walmart's prices on gallon jugs of Delo.

So, I went to my local Walmart and bought what I needed for my next pm service, but it's the new CK-4 SN rated stuff. It will be months before I send in a UOA, but when I do, I'll post it in BITOG's HDEO UOA section.

BTW, I'm using it in a Class 8 Semi truck with a pre-epa Detroit Series 60 engine.

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#4367259 - 03/30/17 08:58 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
njohnson Offline


Registered: 05/30/07
Posts: 578
Loc: Indiana
We need VOA and UOA to see how much zinc are in the different oils. The 30 weight HDEO that have the SN should have the lowered zinc levels. But, the 15W-40 and 5W-40 oils might be a different story.

A VOA of the Delvac Super 1300 15W-40 will show the zinc levels. I am wondering if Mobil will keep it at a higher level. The Mobil 1 TDT 5W-40 is updated for CK-4 and SN, and according to the Product Guide, has 1300 zinc and 1100 phos.

https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide.pdf

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#4367266 - 03/30/17 09:13 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
atoalson Offline


Registered: 03/04/08
Posts: 61
Loc: Missouri
So, is it advised that if I can still find some CJ4 to buy it, regardless of brand? Last time I was at Wal-Mart I believe they still had Delo in CJ4.
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#4367300 - 03/30/17 10:16 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
Dak27 Offline


Registered: 05/18/10
Posts: 155
Loc: UT. USA
There's varying opinions on the CJ-4 vs CK-4 conventional 15W40's. From what I've seen at my local Walmart, the Delo on the shelves is all the CK-4 stuff. However, I looked at the API donut on the back label of the CK-4 Rotella-T4 15W40, and it doesn't show it's an SN rated oil. So I assume it still contains good levels of zinc and phosphorus. If you're not brand loyal to Chevron Delo, I'd consider the Rotella-T4, or if you can still find the SM rated Delo at a really good price, I'd stock up. Same goes for the CJ-4 version of Mobil Delvac Super 1300 15W40; it's excellent oil IMO.

I know the jury is still out on the CK-4 oils, and I'm hoping Chevron thinks again about offering a new SM rated version of their CK-4 Delo 15W40.

But I'm not brand loyal. I used to use Mobil Delvac products in my Semi, and the reason I switched over to Delo is because my Local Chevron Distributor has a massive supply of CJ-4 oils, but now their prices aren't matching/beating Walmart's. I also switched to Delo because I can find the 10W30 XLE at Walmart at a really good price. I run the 10W30 in the coldest Winter months, and Walmart doesn't stock Delvac Elite, now called Delvac Extreme 10W30.

But I see Walmart offers every variety of Rotella products and at good prices. If my UOA on the Delo CK-4 15W40 comes back looking funky, I'm definitely switching over to Rotella products.

In my opinion, Delvac, Rotella, and Delo are excellent products, save the CK-4 SN dual rated oils, until I see more evidence on them. I base my decisions on price and performance, so I'm watching closely at this time.

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#4367311 - 03/30/17 10:30 AM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
pwr2tow Offline


Registered: 02/02/07
Posts: 144
Loc: -38*F winter, 118*F summer
Originally Posted By: atoalson
With all this talk of reduced zinc and phosphorous, but increased shear stability and other benefits, which of the big three brands is the standout leader? I'm referencing Delo 400, Delvac 1300 and Rotella T4, all 15W-40 flavors. I can't seem to find a PDS on rotella T4. Cummins says 15K OCI are fine, however I do mine at 10K miles since that mileage approaches a year interval and it's easier to keep track of. Current fill is Delvac 1300 CJ4. Needing to change the oil in the next several weeks. Thanks.

Off subject a little bit but you do realize to keep warranty your owners manual States 6 months or 15,000 miles whichever comes first

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#4367434 - 03/30/17 12:55 PM Re: Which of the big three in 15W-40 CK4 [Re: pwr2tow]
atoalson Offline


Registered: 03/04/08
Posts: 61
Loc: Missouri
Correct.
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#4367440 - 03/30/17 01:04 PM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
4WD Online   confused


Registered: 09/21/10
Posts: 6414
Loc: Texas
Been a good supply of the Delvac CJ around here and on sale - so just put in gasser.
IMO - current extreme marketing of Rotella has made for good prices on the other two - and hard to wrong with the holy trinity of HDEO ...

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#4367445 - 03/30/17 01:09 PM Re: Which of the big three in 15W-40 CK4 [Re: Dak27]
Ramblejam Offline


Registered: 11/05/13
Posts: 3210
Loc: Kentucky
Originally Posted By: Dak27
save the CK-4 SN dual rated oils, until I see more evidence on them

Cummins disagrees with you.

PC-11 was under R&D for years and millions of miles before being released as CK-4. Any of the oils you've mentioned have demonstrated excellent performance, will carry the Cummins spec (20086), and are fully approved for usage in the ISB6.7 engine. I realize it's difficult to get away from old thinking (more ZDDP = better), but the new generation of additive packages really work well.

P.S. - The Cummins ISB engine test (ASTM D7484) is a part of CK-4. In other words, any CK-4 oil has been validated against the specialized needs of your engine architecture.

Don't let the fear mongering get to you. grin

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#4367459 - 03/30/17 01:31 PM Re: Which of the big three in 15W-40 CK4 [Re: Ramblejam]
Dak27 Offline


Registered: 05/18/10
Posts: 155
Loc: UT. USA
I see Detroit approves the new CK-4 oils for use in their motors as well. Like I posted previously, I'll be putting CK-4 SN rated 15W40 in my Detroit Series 60 my next pm service, and I'm going to send a sample of the used oil to see how it performed. I prefer doing it this way.

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#4367463 - 03/30/17 01:35 PM Re: Which of the big three in 15W-40 CK4 [Re: Dak27]
Ramblejam Offline


Registered: 11/05/13
Posts: 3210
Loc: Kentucky
You can't use FA-4 is the Series 60, MBE900, and MBE4000. However, CK-4 (DFS 93K222) is approved.

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#4367581 - 03/30/17 03:44 PM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
Solarent Offline


Registered: 10/24/11
Posts: 945
Loc: Toronto ON
Originally Posted By: atoalson
With all this talk of reduced zinc and phosphorous, but increased shear stability and other benefits, which of the big three brands is the standout leader? I'm referencing Delo 400, Delvac 1300 and Rotella T4, all 15W-40 flavors. I can't seem to find a PDS on rotella T4. Cummins says 15K OCI are fine, however I do mine at 10K miles since that mileage approaches a year interval and it's easier to keep track of. Current fill is Delvac 1300 CJ4. Needing to change the oil in the next several weeks. Thanks.


Remember that all 3 of these oils are held to the same standard of wear protection, shear stability, oxidation resistance and soot handling. A CK-4 oil with lower zinc/phosphorus content will give similar levels of performance to those with the higher zinc/phos content. That's because they are all tested using the same engines and bench-marked against the same wear performance.

In my opinion, I like the CK-4/SN and FA-4/SN packages because it represents an evolution in the additive technology. If you think about it, the universal oils are required to meet the same standards with lower zinc/phos, which means whatever ashless dispersant they replaced it with must be pretty awesome technology.

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#4367650 - 03/30/17 05:06 PM Re: Which of the big three in 15W-40 CK4 [Re: atoalson]
atoalson Offline


Registered: 03/04/08
Posts: 61
Loc: Missouri
Ok, so lets assume there's no more CJ4. On paper does Delo CK4 appear a little better than Delvac CK4? I'm sure our engines would never know the difference but there's some decent difference in specs between the two oils.
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2016 RAM 3500 SRW. 6.7L CTD.

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#4367782 - 03/30/17 07:48 PM Re: Which of the big three in 15W-40 CK4 [Re: Ramblejam]
Dak27 Offline


Registered: 05/18/10
Posts: 155
Loc: UT. USA
Exactly, CK-4.

FA-4 is for new generation motors, as I've read, 2017 motors and beyond.

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