Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 11-30-2011, 07:18 AM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,166
Quote:
Originally Posted by tangofox007 View Post
None of which has anything to do with whether a particular 15W40 (or any other weight) oil is rated for gasoline engines.



Rather make decisions on the basis of rumor and hearsay than rely on the API rating?
Simply look at the S (spark ignited) ratings on the container. The diesel oils that I've seen have always had numerous anc durrent S ratings. The only problem is that this oil is typically a viscosity that is too high for modern gas engines.

__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #17  
Old 11-30-2011, 07:24 AM
Registered User
 
Join Date: Sep 2007
Posts: 3,544
I use Rotella 10W-30 in winter months in the 240D. When it snows, it gets taken off the road. It snowed yesterday, so the Cherokee is the DD. I also use the Rotella 10W-30 in it. Check Shell Rotella's website before you claim its not diesel rated.
Tom
Reply With Quote
  #18  
Old 11-30-2011, 08:27 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,613
I have seen Rotella in straight thirty weight but never ten w thirty.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #19  
Old 11-30-2011, 08:34 AM
E150GT's Avatar
I'm a chicken
 
Join Date: Sep 2006
Location: SAN ANTONIO, TEXAS
Posts: 1,148
So I guess even modern diesels use thick oil still?
__________________
1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual
Reply With Quote
  #20  
Old 11-30-2011, 09:14 AM
Registered User
 
Join Date: Sep 2007
Posts: 3,544
Quote:
Originally Posted by t walgamuth View Post
I have seen Rotella in straight thirty weight but never ten w thirty.
I think Rual King carries it. I think I've seen it on their shelves. I order a case from NAPA.
From what I understand regualr oil would work for a short interval. Diesel rated oil keeps the particalates in susspension better and over a longer duration. The soot from diesel combustion gets into the oil. Now the ZZPD or whatever factor is a problem for odler engines. The more modern emmissions don't like zinc. It fouls them up or contaminates them.
Tom
Reply With Quote
  #21  
Old 11-30-2011, 09:56 AM
Registered User
 
Join Date: Sep 2004
Posts: 8,971
Quote:
Originally Posted by t walgamuth View Post
I have seen Rotella in straight thirty weight but never ten w thirty.
You should get out more often!!!
Reply With Quote
  #22  
Old 11-30-2011, 11:35 AM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,166
Quote:
Originally Posted by E150GT View Post
So I guess even modern diesels use thick oil still?
Actually 15W40 is not that terrible thick. It is 15 weight in cold weather and stiffens up to 40 in the heat.

As Tom said, 30W used to be much more common in these oils, but as the multiple viscosity products get better and better, the old single weights are pretty muich going away.

Although the Rotellas and such are commonly found in 15W40 these days, other weights do appear and are available. If it is 15W40 though, it is most likely if not certainly a diesel type.
__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #23  
Old 11-30-2011, 11:56 AM
compu_85's Avatar
Cruisin on Electric Ave.
 
Join Date: May 2008
Location: La Conner, WA
Posts: 5,234
Quote:
Originally Posted by LarryBible View Post
If it is 15W40 though, it is most likely if not certainly a diesel type.
Same with 5w40. Yes, there are distinctions among them but in general any 5w40 will work well in our older cars. It works out well for an "over the web" tech tip

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
Reply With Quote
  #24  
Old 12-01-2011, 08:14 AM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,166
Quote:
Originally Posted by compu_85 View Post
Same with 5w40. Yes, there are distinctions among them but in general any 5w40 will work well in our older cars. It works out well for an "over the web" tech tip

-J

Maybe so, but weight is NOT the determining factor in choosing oil for a diesel or an older flat tappet engine. The oils commonly referred to as "diesel oils" are specifically designed for diesels and available in a few various weights.

What makes an oil suitable for a diesel and for a flat tappet engine is the additive package. For the "diesel oils" designated with something like C-J4, they contain a high pressure additive called ZDDP as well as large amounts of detergents for soot dispersal.

Although there are common weights, such as 15W40 for these oils, do NOT assume that the oil jug you are picking up is correct with out looking at the API specs. If it says C-J4, it might even be up the C-K by now, then you've got the right stuff.
__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #25  
Old 12-01-2011, 09:31 AM
Registered User
 
Join Date: Sep 2007
Posts: 3,544
Quote:
Originally Posted by LarryBible View Post
Maybe so, but weight is NOT the determining factor in choosing oil for a diesel or an older flat tappet engine. The oils commonly referred to as "diesel oils" are specifically designed for diesels and available in a few various weights.

What makes an oil suitable for a diesel and for a flat tappet engine is the additive package. For the "diesel oils" designated with something like C-J4, they contain a high pressure additive called ZDDP as well as large amounts of detergents for soot dispersal.

Although there are common weights, such as 15W40 for these oils, do NOT assume that the oil jug you are picking up is correct with out looking at the API specs. If it says C-J4, it might even be up the C-K by now, then you've got the right stuff.
I agree with Larry. Check for the C-J4 dsignation. Wieght isn't the only factor. Ford sells a 0W-30 diesel rated oil:Motorcraft® Motor Oils
Also, Amsoil sells some higher ZDDP oils. VW, MB ect. I think has some rated specs like 505.5 for VW newer engines. Some as I mentioned earlier have the ZDDP taken out so as not to foul the newer emmission equipment.
Tom
Reply With Quote
  #26  
Old 12-01-2011, 09:36 AM
Registered User
 
Join Date: Sep 2004
Posts: 8,971
Quote:
Originally Posted by 75Sv1 View Post
Check for the C-J4 dsignation.
That might or might not be the right answer. Depends on which of the original questions you are answering.

Quote:
Originally Posted by piccolovic View Post

Can regular multi-vis oil be used in these diesel engines?

Also, what about using 15W40 oil in gas engines?
Reply With Quote
  #27  
Old 12-01-2011, 11:15 AM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,166
I realize we've kicked the subject around a good bit, but I think both of the PO's questions have been answered.

Use CJ4 for the diesel as opposed to a regular oil and yes CJ-4 works great in older engines with flat tappets.

Has your question been answered picollo?
__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #28  
Old 12-01-2011, 01:09 PM
piccolovic's Avatar
OLD LADY
 
Join Date: Jun 2002
Location: FL
Posts: 779
WEll, the other family car here is a '97 Honda CRV SUV. Is that an "older engine" that would benefit from using the 15W40 for diesels, like Delo or Delvac?
__________________
1983 300D, the "Avocado"
1976 240D, 4-spd the "Pumpkin", SOLD to Pierre
1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002
Reply With Quote
  #29  
Old 12-01-2011, 01:32 PM
Posting since Jan 2000
 
Join Date: Sep 2011
Posts: 7,166
No the Honda will be fine with 5W30 or whatever is specified. No need for ZDDP.
__________________
2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

Annoy a Liberal, Read the Constitution
Reply With Quote
  #30  
Old 12-01-2011, 01:47 PM
Registered User
 
Join Date: Sep 2007
Posts: 3,544
Quote:
Originally Posted by LarryBible View Post
No the Honda will be fine with 5W30 or whatever is specified. No need for ZDDP.
I doubt it would help in any way( the 15W-40). I think the engine would be an OHV (OVerHead Valve) engine. Also, with the thicker oil, I'd expect to loose some MPG. I used to run 20W-50 in a 351W. I'd loose 2 mpg as compared to 10W-40. I'd also tend to run a synthetic in engines that don't leak. I have seen a MPG increase, others don't. There is a trand for lighter weight oils in the newer engines. I think I run a 5W-30 synthetic in my Ford Contours. I didn't see any wear on the camshafts at around 200K. The engine is still running a 220K with another owner. It didn't like thinker oils (4 cyl). I think I ran a 20W-50 or such synthectis in it. It ratteled bad. I'd usually run at leat 7.5K on oil changes. I think I changed oil at 3K.
Tom

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 03:58 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page