Not trying to start any lengthy oil debates, just a rating question. In the powerstroke supplement booklet it says that the oil specification is WSS-M2C171-D, CI-4/SL, DHD-1

Does that mean the oil your supposed to use must meet all of these specs, or just one of them? I am currently running rotella t 15W40, and am thinking of switching to rotella t 10w30, but the 10w30 does not have the DHD-1 rating.

P.S. Don't bother wasting your time trying to tell me why mobil or castrol or royal purple is much better than the oil that I prefer to use. This is the brand that has been in the truck since day one, and will continue to be in it til I get rid of it.
Ryan

 

I have not heard of the other specifications but most say CI and CH(min) is required. I am not sure where it is documented but someone said as low as 5w30 was approved my Ford for synthetics.

If that brand of oil is what you are going to use until you get rid of it then why bother worrying about the other specifications?

 

Because if DHD-1 is required then I'll stick with 15w40, as 10w30 does not carry the DHD-1 rating.

 

The ratings are what's important. The rest is marketing puffery.

 

The oil specs listed in Ford's Owner's Guide Supplement for the 6.0 state : For normal or severe service, use Motorcraft oil OR an equivalent oil conforming to Ford Specification WSS-M2C171-D OR API Service categories CI-4, CI-4/SL OR DHD-1. If CH-4 oil is not available, CH-4 is acceptable. I believe the key word here is "OR". Since it does not state "and", you are OK running a CI-4 oil.

The WSS standard is a Ford standard, and I don't know if there are any oils other than Motorcraft oil carrying this approval. The API categories are the American Petroleum Institute ratings and is what most oils available to us are rated. The DHD-1 specification is a global diesel engine oil approval. This was created to allow oil and engine manufacturers that have a global standard which will them to market their engines and oils throughout the world. Here's a link to a recommended guideline concerning DHD-1 -> http://www.jama.or.jp/e_press/voice/2001/dhd-1.pdf

How many oils are there, available to the consumer here in the U.S., that meet the DHD-1 rating?

 

Looks like the 10W 30 would be acceptable according to the web page. http://www.shell-lubricants.com/prod...RotellaTMG.pdf Slightly lower base number. Doesn't have all the ratings and approvals the 15W 40 does but it is API CI-4 which, according to the PSD manual, should be acceptable. Just kinda curious, why are you considering the change? Do you live in a cold climate?

Regards,

Morris

 

Morris, no I live in Florida, figured the 15w40 was waisting fuel mileage. Some here have suggested better milage when switching to 10w30.

Since no one here had this info, and the fact that I have worked as a contractor to most of these companies, I took the liberty of researching this myself. Keep In Mind These Are Conventional Oils Only, NOT SYNTHETIC!!


Oil MFG. Tradename weight rating
BP Vanellus 10w30 CI-4
BP Vanellus 15w40 CI-4
Castrol RX SHD 15w40 CI-4
Chevron Delo 400 15w40 CI-4, DHD-1
Citgo Mystk JT-8 10w30 CI-4, M2C171-D
Citgo Mystk JT-8 15w40 CI-4, DHD-1
Citgo Mystk JT-8 15w50 CI-4, DHD-1
Conoco HD Fleet Sup. 10w30 CI-4, M2C171-D
Conoco HD Fleet Sup. 15w40 CI-4
Exxon XD-3 10w30 CI-4
Exxon XD-3 15w40 CI-4
Kendall Super D 3 15w40 CI-4, DHD-1
Mobil Delvac 1300 10w30 CI-4
Mobil Delvac 1300 15w40 CI-4, DHD-1
Pennzoil Longlife HDO 15w40 CI-4, DHD-1
Phillips 66 Super HD II 15w40 CI-4
Quakerstate Universal HDX 10w30 CI-4, M2C171-D
Quakerstate Universal HDX 15w40 CI-4, M2C171-D
Shell Rotella T 10w30 CI-4
Shell Rotella T 15w40 CI-4, DHD-1
Sunoco Super C 15w40 CI-4
Texaco Ursa Super + 15w40 CI-4, DHD-1
76 T5X 15w40 CI-4


Ok now to tell you the rest of the story. Oil is really just oil, no matter what brand you use. They all manufacture base stocks that all oils are made of, including synthetics, they also buy/sell base stocks to and from each other. They also blend for one another under the specifications setforth by the trademark owner.

BP markets Bp, and Castrol brands
ChevronTexaco markets the Chevron and Texaco brands
Citgo is a stand alone
Conoco Phillips markets Conoco, Phillips66, 76, and Kendall brands
ExxonMobil markets the Exxon and Mobil brands
Shell markets Coastal Unilube, Pennzoil, Quakerstate, and Shell brands
Sunoco is a stand alone

I either made it somewhat clearer, or have completly confused the masses.

Ryan

 

I suggest that you run a 5W-30 grade oil made by Amsoil especially for diesel engines!! Amsoil is the best oil for the money.

By the way, I am NOT a oil dealer nor am I associated in anyway with amsoil. I just had good experiences with their product.

 

Thanks Ryan,
I run Mobil Delvac 1 5W40 because it reduces cold oil pressure to under 80 pounds, idle. (cured my leaky rear main) I think synthetics may also help with mileage slightly and really quiet down the injectors. Shell makes a synthetic Rotella that meets the required specs. Why don't you try that? It should be fine.

 

I should also mention the synthetics all carried the same rating as the parent oil, and in most cases was higher. Bob I really cant justify the cost of synthetics, the analysis program, and the additional filteration to get hte life out of a synthetic. I figure Rotella T meets CI-4 and DHD-1 ratings, and I can afford to change it every 5,000 miles. Now when my truck gets out of the warranty window, I'll probably move to synthetics where I don't have to worry about oil change intervals. It was also interesting that alot of brands that people usually look down upon actually took the time to get their oil certified under the Ford spec. Citgo, Conoco, and Quakerstate. I applaude them for that, that would be very cut and dry in a warranty situation.

Ryan

 

According to the diesel mechanic I spoke with on Thursday, there is only about 10 psi at the rear main seal. I asked specifically about using synthetic to solve the drippy rear main. He doubts using synthetic would affect the rear main. This tech wasn't very encouraging over the cost/benefit of using synthetic.

What do you mean about quieting down the injectors? How does that work?

 

I now can buy Mobil 1 Suv (same specs as Delvac 1) at Walmart for 4.77/quart. If I subtract the cost of Motorcraft at 150/quart, I find that with Texas sales tax there is a difference of $50.36 per oil Change.(14 Qt) For me, that is a small price to pay for all the practical benefits of running Mobil 1.

 

Bob, Not trying to start an arguement but just trying to get info. What are the "practical benefits"?

 

Just a reminder to all, Rotella T does not have anti-foaming agents. It is extremely important that the oil has these. One little tid bit of information for everyone. The motorcraft oil is the same oil as Pennzoil LONGLIFE 15w40. Pennzoil bottles all of Motorcrafts oils. Just like Valvoline bottles all NAPA Auto Parts oil, and like Havoline bottles for Advance Auto Parts.

 

PSD6litre, I was told by a Ford Engineer at the Powerstroke Demo Day at my local dealer that the Motorcraft Oil is refined and bottled by Conoco. He gave me a big marketing speel how they test each "batch". I was asking oil and oil change questions.