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Mobil 1 0W-40 or 5w-40 in 617
I noticed that Mobil recommends 0W-40 for the W123 diesel motors but since it has a lower diesel spec than 5W-40, I emailed Mobil asking which one was really better. It took a couple of tries before I got something other than the blanket answer of either would work. Here is the response that I got:
Ron, The Mobil1 Turbo Diesel Truck 5W40 motor oil would have better soot control and be the best choice for diesel engines, drain intervals would be the same. -MJ Ron wrote: > I know that either product meets all of the requirements for the > engines, but which one would protect the engine better or have the > longest oil change interval? Will one or the other handle more soot > loading? Would there be any difference in deposits in the combustion > chamber? > > Thanks, > > Ron > > > -----Original Message----- > From: ExxonMobil [mailto:mobilproducts@ourdataworks.com] > Sent: Tuesday, June 09, 2009 10:36 AM > > Subject: (no subject) > > Ron, > > Either product can be utilized can be utilized in both of these > vehicles without issue, they meet all the requirements for the older > vehicles that you have listed. So it may very well come down to what > is easier for you to locate and purchase. The Mobil1 0W40 motor oil > meets API "SM/CF" >
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Ron Schroeder '85 300 Turbo Diesel 2 tank WVO '83 300 Turbo Diesel 2 tank WVO Some former WVO vehicles since ~1980: '83 Mercedes 240D '80 Audi 4000D '83 ISUZU Pup '70 SAAB 99 with Kubota diesel '76 Honda Civic with Kubota diesel '86 Golf Several diesel generators All with 2 tank WVO conversion LI NY |
#2
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Use the 5w40. The 0w40 oil is almost a 0w30, wheras the 5w40 is well into the 40 weight range.
When I used the 0w40 oil in my TDI the engine sounded like it was cold all the time. I stick with 5w40 now (the 0w40 oil is specifically approved for my engine though) -Jason
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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. |
#3
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Yep, use the 5w40.....the 0w40 is too thin. It makes the 617 sound clattery (probably not a good thing)
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#4
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sounds like a sales pitch to me. I just stick with 15W-40
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
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0w20 really lets the bearings and rods sing..
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2004 Infiniti G35 3.5L 6mt Coupe 73K miles 25.6mpg ytd 2001 Green Audi TT 225 AWD Roadster 71K 6sp 30.9mpg >>STOLEN<< 1982 300D Turbo 231K 120hp? 28.1mpg YTD |
#6
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In colder climates the 5w40 is a great thing to use, it cranks over much faster in the cold temps....and oil pressure comes up faster. I'd especially recommend it for the colder climates.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#7
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Some of the VW TDI guys started using 0w40 when it first came out and reported high metal content in their oil analysis.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#8
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Quote:
FYI, in an emergency I have found that most Mobil dino oils for regular passenger cars have at least a CF rating. Most other brands are only SM (gasoline only). If I was stuck needing a top off, I would have no problem using any Mobil 10w-40 oil in my W123s. It's got to be better than any diesel oil from the early '80s.
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Ron Schroeder '85 300 Turbo Diesel 2 tank WVO '83 300 Turbo Diesel 2 tank WVO Some former WVO vehicles since ~1980: '83 Mercedes 240D '80 Audi 4000D '83 ISUZU Pup '70 SAAB 99 with Kubota diesel '76 Honda Civic with Kubota diesel '86 Golf Several diesel generators All with 2 tank WVO conversion LI NY |
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