PHILIP8N
Veteran Member
We build compressors for Sibera with expeted temps -40F. We use John Deere 0w-40 in the engines, 540hp Cat C15 and 630hp Cat C18. I think you will be happy with the JD 0w-40. Philip.
Your missing the point i'm trying to make here, with out getting into it too much soot is a by product of combustion,tiny wear particles a CJ-4 oil suspends it(dispersant)better then any oil in the past so your filter has a better chance of removing it and keeping it away from vital parts that older spec of the M1 will not handle it like currant API oil will,doesn't matter if it's a 500hp CAT or 20 hp compact soot is soot you do not want it in your engine but there's no getting away from it so you want an oil that will handle it.Yeah, well ....... true enough ..... but then, unless I misunderstood the OP wasn't asking for a general oil recommendation for his heavy-duty Class 8 semi tractor ..... he was asking for 0w40 oil recommendation for a CUT .....
Yup ... newer ain't always better tho' ..... given a particular application.
CJ-4 oils were specifically formulated to meet compatibility requirements with particular emission devices (specifically diesel particulate filters) used on-road vehicles:
API CJ-4 Facts
In order to meet these compatibility requirements it appears some tradeoffs were made (despite what API and oil refiners/formulators might claim)
FWIW, M1 0w40 was the factory-fill from Mercedes on my OM 647 engine (2.7L, 154 HP) ........ and Mercedes approves it for use with extended drain intervals.
I suspect that if M1 0w40's soot dispersant capabilities were lacking, Mercedes would not be so inclined.
I do run extended drain intervals, which on average have ranged on average from 13K to 18K miles, although I have went much longer when I had the bypass filtration set up on it.
Personally, I currently have 345,000 miles on the vehicle using only this oil .... running in winter and summer conditions, ranging from south & west Texas (Laredo/El Paso), Arizona (Nogales, Tuscon, Phoenix) to Minnesota, Michigan (UP & LP), Ontario (as far up as Sudbury), and Quebec ..... operating in temps approaching 120 degrees F in the summer, and -25 below zero F in the winter ..... and have a number of friends, doing the same thing, with the same vehicle/motor/oil ..... with vehicle mileages ranging from 400K to over 800K ..... on original engines .....
My Blackstone UOA's speak for themselves, in terms of the performance of the product - note that the mileage on the current oil sump, as of the time of the following oil analysis, is 47,625 miles. Make up oil reported is cumulative (6.75 total quarts used over 47K+ miles):
It probably depends on what the manufacturer recommends - in the case of my MB diesel in the van, it came with M1 0w40 synthetic from the factory .... but Cummins recommends no synthetic for the ISB in my RAM pickup until the engine is broken in ......Transit said to break engine in first but then I see many autos come with synthetic.
I dunno about OEM oil .... maybe just OEM-approved/recommended conventional oil.Is it old school or do I need to break it in with the OEM oil.
No, I don't think so .... I "get it" ..... I'm just kinda ignoring itYour missing the point i'm trying to make here,
Is that something you are stating based on an inside knowledge of Mobil's blending practices and oil formulations ...... or just an assumption based on it's API letter rating ?without getting into it too much soot is a by product of combustion, tiny wear particles a CJ-4 oil suspends it (dispersant) better then any oil in the past so your filter has a better chance of removing it and keeping it away from vital parts that older spec of the M1 will not handle it like currant API oil will, doesn't matter if it's a 500hp CAT or 20 hp compact soot is soot you do not want it in your engine but there's no getting away from it so you want an oil that will handle it.
Thanks - I willbut hey to each is his own carry on!
Ya think ?and you both missed the point.
..... little in common .... ?Point is, tractors, gas or diesel, other than having an engine as motive power, have little in common with an on road engine.
Sure .... some of them ..... even most of them .... do ..... but not allOn road engines operate at a wide range of RPM and a wide range of loading that changes constantly.
.... really ?Tractors operate (if the operator has any sense) at PTO rated rpm and the load may vary but the range of operation is much narrower.
Indeed ....Oil related threads remind me of political threads. Everyone has an opinion but most require extreme distillation to reach a plausable conclusion.
Running a bypass filter set up makes all the difference,happen to have one with out it listing soot levels and wear metals? for the same type intervals?No, I don't think so .... I "get it" ..... I'm just kinda ignoring it
It is a valid point ..... but ......
Is that something you are stating based on an inside knowledge of Mobil's blending practices and oil formulations ...... or just an assumption based on it's API letter rating ?
Please keep in mind I'm running a vehicle with a heavily EGR'ed engine (up to 35% EGR, but no DPF) ..... a 50 state engine .... I have no shortage of soot here.
I've spent my time on BITOG too.... I do know and understand what the deal is with soot
Could be that the OP is buying a tractor that has the necessary emissions equipment that will require him to run a CJ-4 oil .... dunno.
Supposedly it is an EPA Tier IV engine .... EGR ? .... DPF ?
Thanks - I will
Here's the deal - there are a variety of attributes in an add package that play into how a motor oil will perform. Dispersants are one of them - but they ain't the only one.
I can tell ya this tho' - I've seen UOA's from a friend's (newer) Sprinter that must use the newer oil specs due to the presence of emissions equipment (EGR/DPF) .... at 10K miles his oil is toast .... done .... fini .... game over ...
..... while I'm at 14 to 18K miles using the older CF-rated M1 0w40 .... and Blackstone is telling me I'm good to go for at least a few thousand more.
As to whether the oil I'm using is doing it's job, consider this: I currently have 345K+ miles on the clock with this oil - figuring a 50 mph average speed, that equates to around 6900 hours of operation using this oil.
In reality, it's considerably higher than that - because I idle the truck quite a bit, particularly in the summer (recharging a house battery bank and trying to stay cool while living inside a tin can, in triple digit temps) - and that never shows up on the clock.
Have a look at the comments section on the attached UOA's with regards to apparent condition of the engine - the oil is clearly doing it's job - and doing it well.