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#16
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#17
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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 |
#18
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I have seen Rotella in straight thirty weight but never ten w thirty.
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[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. |
#19
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So I guess even modern diesels use thick oil still?
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1984 300SD Orient Red/ Palomino 1989 560SEC 2016 Mazda 6 6 speed manual 1995 Ford F-150 reg cab 4.9 5speed manual |
#20
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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 |
#21
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You should get out more often!!!
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#22
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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.
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#23
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-J
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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. |
#24
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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.
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#25
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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 |
#26
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That might or might not be the right answer. Depends on which of the original questions you are answering.
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#27
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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?
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#28
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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?
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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 |
#29
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No the Honda will be fine with 5W30 or whatever is specified. No need for ZDDP.
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#30
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Tom |
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