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Best oil for old 12v Cummins, extended drain??? #4288925
12/30/16 02:56 PM
12/30/16 02:56 PM
Joined: Dec 2016
Posts: 35
Conroe, TX
NVRENUFF Offline OP
NVRENUFF  Offline OP
Joined: Dec 2016
Posts: 35
Conroe, TX
I'm sure this will bring all sorts of opinions but I'd like some thoughts on this. I have a couple old first gen Dodges with the 12v, one is stock but turned up a little and the other is built and runs @75psi boost and 4,200rpm. It has 140lb valve springs so it's under much higher strain than stock. All these new oils seem to trade off strength for emissions, so what would be the best oil to run long term in these old trucks? Working in the oilfield I rack up the hwy miles and have extended idle time. I've been running Rotella T6, changing the M1 filter at 6k and oil change every 12k. Looking at Mobil Delvac 1 esp, it's pricey but looks good on paper for extending drain intervals. I like Amsoil but don't like the hassle of ordering online, I prefer over the counter sales.

Thanks for any info and opinions!

Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4288933
12/30/16 03:06 PM
12/30/16 03:06 PM
Joined: Jul 2016
Posts: 1,537
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,537
Jacksonville, FL
You certainly don't need the ESP in an old 12v. The T6 is (was) a great oil prior to CK-4 so it will be interesting to see what the new spec will do to SA content that's been used for internal engine protection for years but is bad for diesel emissions equipment. Honestly any of the Majors in a CJ-4 should serve you very well. In TX you could even run the 15w40 Delvac or Delo both of which are excellent oils as is the Rotella. My personal choice would probably be the Delvac or Delo in a 5w40 or a 15w40 over the Rotella but that's splitting hairs IMHO.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4288937
12/30/16 03:11 PM
12/30/16 03:11 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
http://www.swri.org/3pubs/brochure/ae/pdf/CumminsISB.pdf

The only products I've seen advertised specially for, and touting their superior performance in ASTM D7484 are:

Kendall Super-D XA
Phillips 66 Guardol ECT

These both come from ConocoPhillips, and include their "liquid titanium" additive package.

Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4288967
12/30/16 03:33 PM
12/30/16 03:33 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
P.S. -

Originally Posted By: NVRENUFF
M1 filter

Get rid of that filter, and go with Fleetguard LF9028.

http://capitaldieselco.com/images/lube-filter/LT36043.pdf

Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4289087
12/30/16 05:31 PM
12/30/16 05:31 PM
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
Amsoil is good, order in bulk so you have a couple changes handy.


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4289132
12/30/16 06:28 PM
12/30/16 06:28 PM
Joined: May 2007
Posts: 594
Indiana
njohnson Offline
njohnson  Offline
Joined: May 2007
Posts: 594
Indiana
Originally Posted By: NVRENUFF
I'm sure this will bring all sorts of opinions but I'd like some thoughts on this. I have a couple old first gen Dodges with the 12v, one is stock but turned up a little and the other is built and runs @75psi boost and 4,200rpm. It has 140lb valve springs so it's under much higher strain than stock. All these new oils seem to trade off strength for emissions, so what would be the best oil to run long term in these old trucks? Working in the oilfield I rack up the hwy miles and have extended idle time. I've been running Rotella T6, changing the M1 filter at 6k and oil change every 12k. Looking at Mobil Delvac 1 esp, it's pricey but looks good on paper for extending drain intervals. I like Amsoil but don't like the hassle of ordering online, I prefer over the counter sales.

Thanks for any info and opinions!


If you really want to run the Delvac 1 ESP, and want to save some money, look for the biannual rebates Mobil is offering. They were offering rebates on the Mobil 1 oils and the Delvac Super 1300 oil for several years already. Starting in 2015? For sure, last year, they offered rebates on the Delvac 1 ESP oils. $12 off for a gallon jug (limit 5) or a $60 rebate on the 5-gallon pail (limit 2).
The rebates started in March and went through May, then, in August through October.

It makes the cost of the Delvac 1 much more reasonable.

Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4289822
12/31/16 04:01 PM
12/31/16 04:01 PM
Joined: Dec 2016
Posts: 35
Conroe, TX
NVRENUFF Offline OP
NVRENUFF  Offline OP
Joined: Dec 2016
Posts: 35
Conroe, TX
Thanks for the info. My 05' LLY DMAX has 340k running plain Rotella 15/40 at 12k OCI and it's never had even a slight oil leak. Just the dmax is a cleaner running motor, the old industrial flat tappet Cummins is a different beast altogether.

I'll keep an eye out for the rebates and use them when they're available again. I'll do one 10k OCI and have it sampled, then decide from there what's best.

Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4290488
01/01/17 03:35 PM
01/01/17 03:35 PM
Joined: Dec 2010
Posts: 1,451
Washington State (East)
Blaze Offline
Blaze  Offline
Joined: Dec 2010
Posts: 1,451
Washington State (East)
I ran my 12v on John Deere 15-40w.

Re: Best oil for old 12v Cummins, extended drain??? [Re: Ramblejam] #4290521
01/01/17 04:15 PM
01/01/17 04:15 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Offline
A_Harman  Offline
Joined: Oct 2010
Posts: 7,033
Michigan
Originally Posted By: Ramblejam
P.S. -

Originally Posted By: NVRENUFF
M1 filter

Get rid of that filter, and go with Fleetguard LF9028.

http://capitaldieselco.com/images/lube-filter/LT36043.pdf


Yep, dump the M1 filter, and use Fleetguard Stratapores.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4290524
01/01/17 04:19 PM
01/01/17 04:19 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Offline
A_Harman  Offline
Joined: Oct 2010
Posts: 7,033
Michigan
The high load valvesprings on your built 12-valve would definitely make it a candidate for a CI4+ 15w40 oil like Valvoline Premium Blue Classic, or Mobil Delvac MX (if you can still get them). I wouldn't trust modern low-SAPS oils to protect the slider followers in an application like that. Or supplement the modern oils with Redline or ZDDPlus additives.

The stock 12-valve would also be fine on VPBC.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Best oil for old 12v Cummins, extended drain??? [Re: A_Harman] #4290564
01/01/17 05:14 PM
01/01/17 05:14 PM
Joined: Oct 2005
Posts: 321
Schafflund, Germany
Extreme-Duty Offline
Extreme-Duty  Offline
Joined: Oct 2005
Posts: 321
Schafflund, Germany
Originally Posted By: A_Harman
The high load valvesprings on your built 12-valve would definitely make it a candidate for a CI4+ 15w40 oil like Valvoline Premium Blue Classic, or Mobil Delvac MX (if you can still get them). I wouldn't trust modern low-SAPS oils to protect the slider followers in an application like that. Or supplement the modern oils with Redline or ZDDPlus additives.

The stock 12-valve would also be fine on VPBC.


Don't let the newly formed "Pro ACEA E6 & 800 PPM P is the way to go in HDEO" group read this! I am still buying Delvac 1 CI-4+ over here, btw.


Been using EVER-SEEZ and Neverseal on all my stuff - I got it for free!
Re: Best oil for old 12v Cummins, extended drain??? [Re: Extreme-Duty] #4290641
01/01/17 07:12 PM
01/01/17 07:12 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
Originally Posted By: Extreme-Duty
Don't let the newly formed "Pro ACEA E6 & 800 PPM P is the way to go in HDEO" group read this! I am still buying Delvac 1 CI-4+ over here, btw.

Man, I bet you'd hate to see CI-4+ vs. CK-4 comparative wear testing. In other words, welcome to 2017...oils have come a long way with a different approach to wear reduction:

Re: Best oil for old 12v Cummins, extended drain??? [Re: Extreme-Duty] #4290834
01/01/17 11:11 PM
01/01/17 11:11 PM
Joined: Dec 2009
Posts: 25,588
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,588
Regina, Saskatchewan, Canada
Originally Posted By: Extreme-Duty
Don't let the newly formed "Pro ACEA E6 & 800 PPM P is the way to go in HDEO" group read this! I am still buying Delvac 1 CI-4+ over here, btw.

You're lucky you weren't here. That stuff was gone here within weeks of the CJ-4 rollout. wink


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Best oil for old 12v Cummins, extended drain??? [Re: NVRENUFF] #4291005
01/02/17 09:15 AM
01/02/17 09:15 AM
Joined: May 2012
Posts: 5,512
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,512
Fort Lauderdale, FL
I have two clients who routinely squeeze 10,000 hours out of some very heavily used Cummins QSB 5.9 engines using Amsoil 12 TBN 15w40.

At first glance you might think it an irrelevant comparison, but consider that marine 5.9's are turned up quite a bit from a land 5.9's and also see a lot of idle time.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Best oil for old 12v Cummins, extended drain??? [Re: DoubleWasp] #4291683
01/02/17 10:22 PM
01/02/17 10:22 PM
Joined: Dec 2016
Posts: 35
Conroe, TX
NVRENUFF Offline OP
NVRENUFF  Offline OP
Joined: Dec 2016
Posts: 35
Conroe, TX
Originally Posted By: DoubleWasp
I have two clients who routinely squeeze 10,000 hours out of some very heavily used Cummins QSB 5.9 engines using Amsoil 12 TBN 15w40.

At first glance you might think it an irrelevant comparison, but consider that marine 5.9's are turned up quite a bit from a land 5.9's and also see a lot of idle time.

My Passat TDI is the only diesel I've ever had and not turned up, yet. Lol

My idle time is excessive. For instance my duramax had just over 19,000hrs on the motor when it hit 300k miles. Work trucks idle from 3hrs to 3 days at a time depending on the job I'm on. I'm abusive. Lol

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