What Oil do you use in your cummins?

[Harlacher]

Used Amsoil throughout, for years... . Synthetic. Now I go with what ever good quality synthetic oil is on sale at walmart. Just like all the opinions so far state, it is what ever floats your boat; in my opinion Amsoil started the synthetic oill market now most of the major brands, Rotella, Mobile One, Premium Blue all put out a good Synthetic oil that is as good as Amsoil. I change my oil every 10,000 miles. I have a amsoil bypass filtration system also. I went to 10,000 based on oil analylis a long time ago. Truck has over 200,000 miles on it and I get some blue smoke on start up, but never have to add between changes. I know just because oil analysis yrs ago were good does not mean that they would be today. Cost be over $100(Amsoil fiters are half the cost) to change my oil so I am sticking with 10,000 miles.

 

[amsoilman]

Used Amsoil throughout, for years... . Synthetic. Now I go with what ever good quality synthetic oil is on sale at walmart. Just like all the opinions so far state, it is what ever floats your boat; in my opinion Amsoil started the synthetic oill market now most of the major brands, Rotella, Mobile One, Premium Blue all put out a good Synthetic oil that is as good as Amsoil. I change my oil every 10,000 miles. I have a amsoil bypass filtration system also. I went to 10,000 based on oil analylis a long time ago. Truck has over 200,000 miles on it and I get some blue smoke on start up, but never have to add between changes. I know just because oil analysis yrs ago were good does not mean that they would be today. Cost be over $100(Amsoil fiters are half the cost) to change my oil so I am sticking with 10,000 miles.

I do respect your opinion, however, if all of the synthetics were as good as the Amsoil, they (the other manufacturers) would recommend a longer drain interval like Amsoil does, and help save $$$$$ as well as the environment!



Best regards

 

[PAllyn]

Amsoil throughout... ...

 

[Moe]

Rotella 15-40

 

[upsmsp]

Royal Purple synthetic throughout in both my Dodge Cummins pickups. 04. 5 has 95000 miles and the 03 has 148000 miles. Also use it in my wife's 300C. I have a 2003 Sterling Acterra (Mercedes Benz MBE 900 6. 1 Diesel Engine) Straight truck with 310000 miles that has also benefited from Royal Purple use.

 

[Duluth Diesel]

in my opinion Amsoil started the synthetic oill market now most of the major brands, Rotella, Mobile One, Premium Blue all put out a good Synthetic oil that is as good as Amsoil.

Very untrue! AMSOIL is a true Group IV synthetic. The other brands you list are simply Group III hydro-cracked mineral oil base stocks. When it comes to thermal stability, extended drain intervals, and TBN retention, Group IV wins. Do not make the mistake of thinking that the word "synthetic" means the same thing from all oil manufacturers. That's why I posted up that big thread a page or so back explaining the differences. You won't see Rotella T telling you to go 1 year or 25k miles.

 

[Harlacher]

It was my opinion and I stand corrected, however I still think the non-Amsoil synthetics are good enough for me to go 10,000 between changes. I just find it so hard to justify the extra cost of the Amsoil after I have to pay them $50 for filters. They have priced themselves out of my market, I know you get what you pay for, can't afford a damm Corvette either.

 

[BrianJ]

Very untrue! AMSOIL is a true Group IV synthetic. The other brands you list are simply Group III hydro-cracked mineral oil base stocks.

From what I have read, I understand Mobile 1 to be a group IV as well. As far as Valvoline Premium Blue Extreme is concerned, it may be a group III, but it has the advantage of being developed with Cummins for their engines.



Up to 20k I ran Dino Delo, once I hit 20k it's been Valvoline Premium Blue Extreme sythetic every 10k. I sample at every change (free to me), and results have always been solid (now at 85k). I could go further per the sample results, but the last few years I only hit 10k in about a year, so I figure I might as well change it.

 

[Bernie]

I used the Valvoline premium blue extreme (synthetic) in my 06. I bought that truck new.

I bought my 03 used, and not knowing what had been used in it previously, I decided to go with the Valvoline Premium Blue (standard)

 

[J.BURCHFIELD]

AMSOIL Is the best but not available to me at a decent price. I use Mobile One 5 w 40. It is the Turbo that should be pampered. The engine is important too. When changing filters fill the canister with oil after you put the new filter in it. It is more difficult and messy but you need to have oil going to the Turbo bearings right away. It takes longer when the oil has to fill up the canister first. Look at the oil line running directly to the turbo. When you buy oil it is important that it says for TURBO Diesels on the container. Oil is so much cheaper than buying a turbo. I also run a by-pass filter. You can extend your changes or only change filters like the big truck companies. Send an oil sample to a lab that does analyze engine oil on a regular basis and they will tell you if it is OK to continue using the oil that is in the engine. Do as you see fit. It is your truck. MERRY CHRISTMAS

 

[Duluth Diesel]

From what I have read, I understand Mobile 1 to be a group IV as well.

A select few of Mobil 1 products use a small percentage of Group IV base stocks, but are still mostly made up of Group III base stocks. AMSOIL is a true, 100% Group IV (AME, HDD, DME, DEO). Mobil 1 is not. It is a blend with 70+ percent Group III at best. Most of Mobil 1 products are still 100% Group III.

As far as Valvoline Premium Blue Extreme is concerned, it may be a group III, but it has the advantage of being developed with Cummins for their engines.

That is nothing more than a marketing agreement between Cummins and Valvoline. There is nothing special about Premium Blue (Group II conventional) and Premium Blue Extreme (Group III mineral oil base).



-Chuck

 

[BrianJ]

That is nothing more than a marketing agreement between Cummins and Valvoline. There is nothing special about Premium Blue (Group II conventional) and Premium Blue Extreme (Group III mineral oil base). -Chuck

Not according to the folks I have spoken with at Cummins Rocky Mountain. According to them premium blue was a joint development to meet Cummins specs.



The marketing comment could be just as easily applied to AMSOIL. Not knocking the product, but to my knowledge only a few items of ASMOIL's product line have SAE certification. (saying you meet the SAE certification requirements doesn't put the donut on the bottle).

 

[aharman]

Valvoline PB Classic until I ran out.

Just switched to Mobil 1 TDT. Thinking about supplementing it with ZDDPlus to get back my precious zddp content.

 

[KLauber]

I just got Amsoil'd from bow to stern today.

Ken

 

[NavyDood]

It was my opinion and I stand corrected, however I still think the non-Amsoil synthetics are good enough for me to go 10,000 between changes. I just find it so hard to justify the extra cost of the Amsoil after I have to pay them $50 for filters. They have priced themselves out of my market, I know you get what you pay for, can't afford a damm Corvette either.

If you do not plan on extended drain intervals, then there is nothing wrong with running a Group III synthetic oil or straight dino oil. You will save yourself money and your engine longevity will probably not be any different that if you ran Amsoil. You can save half the cost of an Amsoil EaO80 filter by running the Donaldson Endurance ELF7349 filter. They both use the exact same filtering media inside. The Donaldson Endurance can be bought for around $15. 50 a piece shipped. <O</O

Not according to the folks I have spoken with at Cummins Rocky Mountain. According to them premium blue was a joint development to meet Cummins specs.

The marketing comment could be just as easily applied to AMSOIL. Not knocking the product, but to my knowledge only a few items of ASMOIL's product line have SAE certification. (saying you meet the SAE certification requirements doesn't put the donut on the bottle).

And those Cummins specs are met with any other 15w-40 diesel on the market if the oil company blends the oil meeting the CES 20081 specification. This even includes your basic dino oils.

It's API not SAE for the donut. The API donut on the bottle is NOT a mandated/governed item; it is a private company that takes data from automobile manufacturers and determines what qualities motor oils must have to properly lubricate engines. Oil companies use this information to blend additives into base stocks (dino or synthetics) to produce proper motor oils used in automotive engines. Cost is the factor in why Amsoil does not have the certification on every single one of their oils. Amsoil does in fact meet and exceeds all of the API requirements. <O></O>

 

[rashwor]

I have used Mobil Delvac 1300 super in all of my Cummins engines and never had an oil related issue. Works for me.

 

[BrianJ]

And those Cummins specs are met with any other 15w-40 diesel on the market if the oil company blends the oil meeting the CES 20081 specification. This even includes your basic dino oils. [/COLOR]

I don't see where I said anywhere that other oils don't meet cummins spec?!?

It's API not SAE for the donut. The API donut on the bottle is NOT a mandated/governed item; it is a private company that takes data from automobile manufacturers and determines what qualities motor oils must have to properly lubricate engines. Oil companies use this information to blend additives into base stocks (dino or synthetics) to produce proper motor oils used in automotive engines. Cost is the factor in why Amsoil does not have the certification on every single one of their oils. Amsoil does in fact meet and exceeds all of the API requirements. <O></O>

[/COLOR]

I stand corrected on API vs SAE, overlook when posting yesterday.





I care not what anyone else runs in their CTD, if it makes you all giggly to run Amsoil, great. My point is that with proper care and maintenance, just about any other oil that meets cummins specs will get the same life out of the engine.

 

[Mikey-KE7LBB]

I just look for ANY oil that doesn't say CJ-4 on the bottle! I currently use CAT DEO 15W-40 (CI-4+) and will seek out another brand when they eventually switch.

 

[Harlacher]

I care not what anyone else runs in their CTD, if it makes you all giggly to run Amsoil, great. My point is that with proper care and maintenance, just about any other oil that meets cummins specs will get the same life out of the engine.

I think this kind of really sums it up for me. Amsoil is a great oil, if competitively priced it would still be used in my truck.

 

[Dl5treez]

I run Delo 400 LE (CJ-4) in a 1967 Peterbilt 359 powered by a 444 (855) and have excellent oil analysis results... ... ... the lack of zinc in CJ-4 oils causing premature wear is a myth. Only my opinion.