Is this good enough for the Cummins? Mostly just wondering about the weight.
COMPLETELY irrelevant information. Your opinion.... nothing from Cummins saying 10W-30 wont work, or will void the warranty. If you actually knew even 10% of what you think you know, you would know that 10W-30 WAS the recommended oil in Cummins for a good while. Again, either show me a LINK (NOT your opinion or something you supposedly copied and pasted) that shows the PROOF that I have linked.... is either wrong or outdated, or stop responding to me.That is fine and dandy,
I don't see that viscosity listed in my owners manual.
That also warns about the warranty being voided.
The presence of viscosity information on almost all lubricant marketers’ technical literature is an indication that it also is important in the marketing of lubricants. Original equipment manufacturers often specify the lubricant to be used in their equipment by product type and viscosity. Lubricant marketers usually sell their lubricants according to specific viscosity grades, such as SAE 15W40, ISO 46 and AGMA 3.
It is clear that – for the majority of the players in the lubricant industry – the proper viscosity of a fluid is the most important attribute in proper lubrication. There are several reasons for this, including, but not limited to:
• Viscosity affects fluid film thickness under certain conditions of temperature and load in lubrication applications.
• Viscosity affects heat generation and removal in bearings, cylinders and gears.
• Viscosity determines the ease with which machines can be started in low-temperature conditions or
can be kept running in high-temperature conditions.
• Viscosity can be used to control a fluid’s sealing ability, which results in lower consumption.
nah, all that makes WAY too much sense, and provides WAY too much proofFor what it's worth.... nearly all over the road diesels toting 80,000 pound loads these days are factory filling with 10W-30 heavy duty diesel oil. The peak valvetrain loads and requirements for thermal stability has never been greater. It would stand to reason that viscosity has little to do, therefore, with how well an engine oil protects. I mean.... by this logic shouldn't big rigs use 40W-60 and railroad diesel locomotives use 80W-140, and ocean liners would be shoveling asphalt in the sump of those monster ocean liner diesels?
(Diesel locomotives pulling multiple thousand ton loads only use 20W-40, but now we're really comparing grapefruits to grapes )
To say nothing of the fact that the oleodynamic barrier isn't protecting your metal parts from wear by and large, it's the anti wear additives which oxidize and bond to the metal, and there's nothing about the viscosity rating that indicates which oil has more of those than another.
Bottom line, if the oil meets the specifications your engine calls for and you operate within the manufacturer's service intervals... well, all that's left is the viscosity argument, and the heavy duty trucking industry has already spoken there.
I will be trying it also, but will wait to see what the prices are on the new spec'd oils in December. Then I may try either Delvac or Rotella in the 10W-30 synthetic blend :grin2:Personally, I'll be trying 10W-30 HDEO soon
It doesnt matter what you think, what you post, or what irrelevant crap you try to beat people over the head with.... the FACTs are the oil meets the CES 20081 specs that YOU YOURSELF just posted, and therefore Cummins says it can be used. Specs that Cummins says.... if the oil meets those specs, its ok to run. NOTHING ELSE MATTERS!! Im sorry you dont agree and therefore refuse to accept that, but the proof has been shown that you are wrong. Nuff said!Only
10W30 oils meeting CES 20078 (API CI-4) and CES 20081 (API CJ-
4) can be used in the ambient temperature range similar to 15W40 oils.
Okay, riddle me this: if a 5W-40 is approved in colder conditions and won't cause unacceptable wear according to the manufacturer what leads you to believe that 10W-30 HDEO just won't? Because it's not an XW-40?Fact,
Cummins Inc. primary recommendation is
for the use of 15W40 multigrade for normal
operation at ambient temperatures above -15°C [5°F].
While thepreferred viscosity grade is 15W-40, lower viscosity multigrades 5W-40 can be used in colder climates. .
yes
you need to use a oil that meets the CES20081 specs
which has no bearing on if it is the correct weight/viscosity.
Looks like Cummins says as long as a 10W-30 HDEO meets the HTHS and wear requirements (part of running the test to meet the spec) it's just as serviceable as 15W-40.Cummins said:Oils meeting API CI-4 and CJ-4 and a 10W30 viscosity grade, must meet a minimum High Temperature / High Shear viscosity of 3.5 cSt., and ring wear / liner wear requirements of Cummins Inc. and Mack tests. Thus, they can by be used over a wider temperature range than 10W30 oils meeting older API performance classifications.