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Cummins 8.3 oil

A

Anonymous-0

Well-known Member
Hello we bought an old Clark grapple skidder with a cummins 8.3. The guy said to change oil to 10w30 not 15w40. That didn't register much at the time.

Any reasons why anyone can think of? When warm, oil psi does seem low at idle but within spec.

So I went to walmart and got a pail of 10w30, put it in. It says on oil pail for 'gas engines only'. I'm betting I should use 30 weight Diesel engine oil instead, any thoughts.
 
The gasoline oil is probably rated for service as an SL or a S? grade oil. This is usually on the back side of the container and is known as an API rating and is in a circle. The S ratings means spark ignition or gasoline type fuels. It will not have the additive packages you need for a diesel. The most noticeable thing will less detergent and soot handling capability. You need an oil rated for C?? service and the further down the alphabet the last letter is, the better the oil grade. Most likely all you will find now days is the LE or low emission type oils that are EPA mandated for air pollution control.
 
It used to be that S(S-spark ignition-C for compression ignition) rated oils were not for use in Diesels. I see now that the API is calling them S-service/ C-commercial rated instead. Still looks like you should not use S rated oil in a diesel.
Not sure what the slightly heavier 15-40 could possibly do to that old rig. Personally I would change it out and see how it performs.
Link to the API site below. Good lubing!
API
 
Why are you buying oil at WALMART??? Just about everything they keep is the CHEAPEST product they can get built to Walmart specs. Whether it is oil or cloths. Many times it maybe amajor brand name but a different product made to be cheaper so Walmart could sell it cheaper.

On a motor that could easily cost thousands to overhaul I would not buy the cheapest thing I could find for oil.

One of the most common diesel engine oils is Shell Rotella 15w-40. It will meet ALL major engine manufactures requirements. The 10w-30 would be for winter usage only.

I would not be using straight 30w oil in it either. Most 30w oils do not have the right additives for diesels. If they do they are not any cheaper than the 15w-40.

So use what many others have done and do use. That makes the product more economical.
 
As JD said Rotella 15W40 would make a great choice for summer work, 10W30 for winter. I've always wondered if a pail of say Rotella or Essolube XD3 is identical wherever a person buys it, Walmart, TSC, or from Shell or Esso?....Ron
 
(quoted from post at 15:08:52 06/30/13) As JD said Rotella 15W40 would make a great choice for summer work, 10W30 for winter. I've always wondered if a pail of say Rotella or Essolube XD3 is identical wherever a person buys it, Walmart, TSC, or from Shell or Esso?....Ron
Click to expand...

I know for a fact that Walmart has just about everything built to THEIR specifications.

When Excide was making Walmart's batteries they where not the same battery you got at Napa or your OEM dealer. Same plant but different materials. Usually to make them cheaper to make/sell. Life or usage not the main consideration.

I used to wear a certain brand and model of jeans. I compared the ones I bought locally at an independent store to Walmarts. The big writing was the same but if you looked close at the tag the Model has some extra suffix numbers. These made it a different pair of pants but you had to really look close. The Walmart ones where made of lighter material. Theirs did not last as well.

Another family friend works at a Factory in IL that packages chemicals. Brake fluid, starting fluid etc. They packaged Walmarts stuff for a while. Their stuff just got the minimum of additives. It barely would meet spec. HE said Walmart's buyers would come in and TELL them what they where going to pay. Not get a bid, TELL the company what they would pay. So the company was left with cutting the cost of the product to make a profit.

I will bet that this is standard Walmart practice. So I am willing to bet that just about everything they buy has things not in it that the same brand would have when bought at other retailers.

I have always felt that if you use junk products in good stuff you soon will have junk stuff.
 
(quoted from post at 07:37:17 06/30/13)
(quoted from post at 15:08:52 06/30/13) As JD said Rotella 15W40 would make a great choice for summer work, 10W30 for winter. I've always wondered if a pail of say Rotella or Essolube XD3 is identical wherever a person buys it, Walmart, TSC, or from Shell or Esso?....Ron
Click to expand...

I know for a fact that Walmart has just about everything built to THEIR specifications.

When Excide was making Walmart's batteries they where not the same battery you got at Napa or your OEM dealer. Same plant but different materials. Usually to make them cheaper to make/sell. Life or usage not the main consideration.

I used to wear a certain brand and model of jeans. I compared the ones I bought locally at an independent store to Walmarts. The big writing was the same but if you looked close at the tag the Model has some extra suffix numbers. These made it a different pair of pants but you had to really look close. The Walmart ones where made of lighter material. Theirs did not last as well.

Another family friend works at a Factory in IL that packages chemicals. Brake fluid, starting fluid etc. They packaged Walmarts stuff for a while. Their stuff just got the minimum of additives. It barely would meet spec. HE said Walmart's buyers would come in and TELL them what they where going to pay. Not get a bid, TELL the company what they would pay. So the company was left with cutting the cost of the product to make a profit.

I will bet that this is standard Walmart practice. So I am willing to bet that just about everything they buy has things not in it that the same brand would have when bought at other retailers.

I have always felt that if you use junk products in good stuff you soon will have junk stuff.
Click to expand...



Jd you are correct in saying W/M specs alot of the stuff they sell BUT not all.I buy Motor Craft oil there and on the container it reads dist.by F.M.C. and for alot less than at the ford dealer. As for their Ever Start batterys, I don't know who makes them but I've had very good luck with them.
 
Fair comments on cheap oil. At least I have a fresh lube in and will swap it to 15-40. Stil not sure why buddy said go 10-30. I will try to track him down.
 
A friend who runs the co-ops tire shop says he will grind the liner clean out of a walmart-bought tire if he doesn"t notice it"s a walmart tire before he starts. The liners are really thin.
 
The reason CASEIH had Viscosity Oil blend them a 15-40 oil was because Cummins demanded it be used in their engines.
 
(quoted from post at 07:36:20 06/30/13) Hello we bought an old Clark grapple skidder with a cummins 8.3. The guy said to change oil to 10w30 not 15w40. That didn't register much at the time.

Any reasons why anyone can think of? When warm, oil psi does seem low at idle but within spec.

So I went to walmart and got a pail of 10w30, put it in. It says on oil pail for 'gas engines only'. I'm betting I should use 30 weight Diesel engine oil instead, any thoughts.
Click to expand...

First off.. use a diesel rated oil. Cummins did a lot of research on oil and wear and that is why a lot of the heavy duty diesel oils are as good as they are today.

Second.. using a good diesel rated oil, big over the road trucks can run over a million miles between overhauls. So.. I can not tell you how important it is to run a diesel rated oil.

Thirdly.. run a 15w40 diesel oil like shell rotella, or mobil delvac or chevron delo.

If you do winter work then bumping up to a 5w40 oil will be even better but cost more.

Did you hear the part about run a diesel rated oil??

BTW.. walmart and most all autoparts will sell the diesel rated oil, but you have to look for them and they are almost always in gallon containers as an 8.3 usually holds 5 gallons of oil and uses a fleetguard fl3000 filter.

hd diesel rated oils are designed to last 10,000 miles between oil changes.. and gas oils do not have enough additives to last this long.. so ....

use an hd diesel rated oil!!!!!!!
 
Working for a Walmart oil supplier I know for fact that they do
NOT spec their own oil IE, tell us what and how much will be
in it. All pcmo's must meet minimum API standards in order to
be called 10w30 ect. Walmart oil is exactly the same blend as
many auto part suppliers oil that my employer also blends for.
Nothing wrong with Walmart's SuperTech brand oil.
 
I agree with using a 15w-40 diesel oil from a major oil manufacturer, what I don't understand is why anyone would take the word of some random "guy" as knowing what he's talking about.
 
The sunburst certificate on the container tells you the application. Compression engines are rated with a C; like C4. Spark fired engines are rated with an S; like SJ.

Some oils like the heavy duty oils as mentioned above, ROT, Delo, Delvac, carry both ratings like C4/SJ.

Lot of people out there that don't have a clue as to what they are talking about. Others quote something from hearsay without the faintest as to the facts behind it, even if it's true.

Find a 10W-30 with the C rating!!!!!!!!!! Beware of "light duty" pickup diesel applications. What is the rating in the Sun?

Read the container.

If you want some real oil to put in your Cummins get the ROT 5W-40 full Syn. WW has it and the price isn't too bad. I bought a new tractor with a 3.3L Cummins and called them. They said my little baby would "love" to have that oil in it.......oh it's C rated, all weather. I run mine the 300 hour recommended change interval and it's still honey colored when I change it.

But it's your equip, your money, your potential head ache, and your call. Good luck.

Mark
 
You can buy diesel rated 10W30 although you're probably not going to find it at Walmart. The main reason to run a 10W30 in that engine would be for sever cold weather operation. Otherwise I'd run 15W40. Really... I'd run 15W40 year round in this climate.

Rod
 
I wouldn't pay 2 cents more for a bucket of Rotella vs a bucket of SuperTech.
I'll never forget a comment I saw somewhere about Rotella from a lube analyst... the comment being that Rotella was a below average quality oil with an above average marketing program....
If it meets the specs for the engine, it meets the specs. That's more important than using a so called high quality oil that doesn't meet specs.

Rod
 
In N. TX. 15w-40 is just fine and is what's in my other tractors get and used to be in my gas p/ups till I bought some of the new ones and they said that you had better run the oil for which the engine was designed.

So here I had this hot dog 1/2 ton Dodge Hemi with all this hp and torque and it says if you don't use 5w-20, for which the engine was designed, your 8/4 function may not work.

For the heavy duty applications, and I don't know if they had the 8/4 function or not, they go all the way up to 5w-30. Wow! For an oil freak this took some getting used to.

So moving on and the latest purchase was GM and it said the same thing for 5w-30. I know times change, mfg tolerances are tighter, lubes are much better quality, EPA is on their case about more MPG. Sign of the times.

Mark
 
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