Oil for 6.7L Cummins

[Jowens66]

Debating oils for my 6.7L Cummins. It has no egr or dpf.

I’ve been running whatever I can get the best price on…..Kirkland, Rotella, Delo all in the 15w-40 flavor. I’ve been doing a 5k oil change even though the oil minder will send you to 15k or it says change at 7500 for less than ideal conditions like towing, stop and go, ect.

I regularly pull 10,000 pounds. I am considering going to HPL or Amsoil and running a full 15k interval with a fleet guard stratapore filter. What protects the engine best? 5k cheap oil changes or 15k premium oil changes? Price is about about the same.

HPL and Amsoil have several diesel options including the Amsoil Marine Diesel oil that many people run in older diesels without emissions.

Thoughts?

 

[JavierH19]

Can't go wrong with any of them. Off the shelf conventional/syn blend or boutique. Short intervals are always best at the end of the day and an engine will last when you do that no matter the oil as long as it's bare minimum which all hdeo's are even the cheapest. Many crummy gas engines lasted forever when those that owned them did religious 3k intervals and never saw oil consumption, bearing, or timing issues common with them and in those stories it was usually conventional or synthetic blend that was used not even an off the shelf full synthetic let alone boutique.

The best priced oil I can get is mag 1 15w-40 which goes for 2.99 a quart in 10qt jugs on lowes.com. My old trucks run as good as ever on it. It's made by warren highline which makes supertech and other oils.

Cummins guys love delvac extreme and valvoline on other forums. That and Delo XSP and the new Valvoline heavy duty diesel oils are great. I wouldn't worry about doing 15k intervals with any off the shelf full syn hdeo. But if you wanna scratch that itch get amsoil or hpl even if it's their lower cost hdeo options. They hold a lot of oil so it's not the same as a 5qt sump car.

https://www.advlubrication.com/products/heavy-duty-motor-oil?variant=31322359169047
https://www.amsoil.com/p/amsoil-15w-40-heavy-duty-100-synthetic-diesel-oil-adp/?code=ADPTP-EA

https://www.walmart.com/ip/Valvolin...page&athcgid=null&athznid=si&athieid=v0_eeLCw

 

[BrianF]

On my 2017, I was running full 24,000km indexes on nothing fancy, semi synthetic and conventional 10w30 for years. Tested fine with full emissions and tested fine deleted.

Don't over think it. Pick an oil that meets the Cummins requirements and a viscosity that works for your climate. Pick a 30 or 40 weight and go.

 

[6.7 CTD]

HPL, Amsoil, VPBE, or Delo in a 40w; 5 or 15 depending on your climate.

 

[tnt_motorsports]

I've never used anything fancy in my 2012 Ram Cummins. I've run Mobil Delvac 5w-40, Mobil 1300 15w-40 and currently Mystik 15w-40. I have never considered expensive oil for this rig because these engines are easy on oil and the lube isn't going to be the death of your truck. I do run Fleetguard or Mopar filters

FWIW run an oil that meets the sped and go the distance you want to go and do a UOA if you're concerned.

Fuel system maintenance on these rigs is just as important. Make sure you're taking care of that.

 

[jtwrace]

Debating oils for my 6.7L Cummins. It has no egr or dpf.

I’ve been running whatever I can get the best price on…..Kirkland, Rotella, Delo all in the 15w-40 flavor. I’ve been doing a 5k oil change even though the oil minder will send you to 15k or it says change at 7500 for less than ideal conditions like towing, stop and go, ect.

I regularly pull 10,000 pounds. I am considering going to HPL or Amsoil and running a full 15k interval with a fleet guard stratapore filter. What protects the engine best? 5k cheap oil changes or 15k premium oil changes? Price is about about the same.

HPL and Amsoil have several diesel options including the Amsoil Marine Diesel oil that many people run in older diesels without emissions.

Thoughts?

I'd buy in bulk and be done with it. Especially if you're pulling other equipment which requires oil. Shipped to your door and excellent quality.

https://buysinopec.com/collections/diesel-engine-oil

 

[56Cummins]

Mobil Delvac Extreme 15w40(if 2018 or older) and a dbl7349.

I run any ck4 with the Ford F1 approval. Most of them are at the top of spec for zddp.

 

[oil pan 4]

Saftykleen 15w-40.
Seen it go a thousand hours in non emissions Cummins 6.7L common rail engines with no obvious immediate problems.
I wouldn't recommend it.
Probably has no chance of lasting a thousand hours on engines with EGR and fuel dilution from DPF regen (unless your engine has an extra injector for regen).

 

[Jowens66]

2018 model

I do stay on top of fuel filter maint. Fleet guard or oem (same) filters every 15k

Oil filter has been either oem mopar or fleet guard with stratapore media.

I may just continue with my 5k oil changes and run a fleet guard stratapore filter for 15k miles. That’s the worst part of the oil change anyhow.

 

[ripcord]

2018 model

I do stay on top of fuel filter maint. Fleet guard or oem (same) filters every 15k

Oil filter has been either oem mopar or fleet guard with stratapore media.

I may just continue with my 5k oil changes and run a fleet guard stratapore filter for 15k miles. That’s the worst part of the oil change anyhow.

With 5k changes, it doesn't matter a bit which oil you put in there as long as it is a CK or CJ rated oil.

 

[johnmyster]

With your OCI, nothing wrong with any of the major players in 15w-40. My preference would go to Delo XSP, and then Delvac Extreme. Both affordable at WM, and Delvac has done two rebate cycles per year for the past couple of years.

Can't go wrong with the LF16035 but the Donaldson DBL7349 gets the edge in internet snobbery performance and can be had for $52/three pack delivered from cross filters.

 

[johnmyster]

2018 model

I do stay on top of fuel filter maint. Fleet guard or oem (same) filters every 15k

Oil filter has been either oem mopar or fleet guard with stratapore media.

I may just continue with my 5k oil changes and run a fleet guard stratapore filter for 15k miles. That’s the worst part of the oil change anyhow.

Get a $8 amazon filter plug and don't look back. We've had our 2014 truck a year. Three oil changes and exactly zero drops spilled. Just park long enough prior to changing to allow filter draindown and then use the plug.

 

[Jowens66]

Get a $8 amazon filter plug and don't look back. We've had our 2014 truck a year. Three oil changes and exactly zero drops spilled. Just park long enough prior to changing to allow filter draindown and then use the plug.

I have one and have never had an issue with spillage, but struggle to get the filter restarted onto the stud through the wheel well with a prefilled filter. The tire being in the way is most of my trouble.

Maybe there is an easier way than through the wheel well?

 

[johnmyster]

I have one and have never had an issue with spillage, but struggle to get the filter restarted onto the stud through the wheel well with a prefilled filter. The tire being in the way is most of my trouble.

Maybe there is an easier way than through the wheel well?

I have not had issue getting it threaded on mine. It seems to be the easy part of the process. Maybe my arms are long. I seem to recall using my left hand to shimmy the filter up until I can get my right hand under it, at which point the right hand does the spin while lifting move.

Perhaps put a jack under the passenger radius arm jack point and lift up a few inches to raise that corner of the truck while allowing the suspension to droop.

 

[MikeMcC]

I have one and have never had an issue with spillage, but struggle to get the filter restarted onto the stud through the wheel well with a prefilled filter. The tire being in the way is most of my trouble.

Maybe there is an easier way than through the wheel well?

I have a 2024 so have only change the oil ~5ish times on it so far.

This is the hardest part, but you kinda learn how to do it with time. I do try to avoid pre-filling the filter to the absolute top. That filter holds a lot of oil, and it can get too heavy to hold out with your arm extended.


Regarding oils, I've run 2x samples running Rotella on 5k increments, and the results were good. From a (subjective) ear test, I think I prefer Delvac Extreme ESP. On my second fill of that, and will sample when I drain.


I also think short intervals is the safer option in an emissions equipped diesel. I don't want to roll around 10,000 miles with a fuel dilution problem, even if it is top tier oil.

 

[Bighorn2500]

That engine won’t really care what you put in it, I do 7500-10k intervals and UOA’s have come back good. Rotella T6, VPBE, Mobil, or Delo are all good oils.

I’d focus more on using good filters: oil, air, and fuel. Donaldson makes some really good oil & air filters. Their top of the line oil filters are rated at 99% efficiency @ 15 micron, just edging out the Fleetguard filters which I’ve used and cut open on here as well before. LF16035 and LF9028.

 

[6.7 CTD]

This might be an anomaly, but I’ve noticed less soot loading of my DPF (Monitor with Scangauge 3) while using the Delo XSP 400 5W40. Maybe just a coincidence? Either way, I think we all prefer less soot driven regens (more fuel dilution).

 

[Bighorn2500]

This might be an anomaly, but I’ve noticed less soot loading of my DPF (Monitor with Scangauge 3) while using the Delo XSP 400 5W40. Maybe just a coincidence? Either way, I think we all prefer less soot driven regens (more fuel dilution).

Not sure if it has anything to do with it but the zinc and phosphorus is limited to 800ppm specifically in the Delo 5W40 XSP that’s why it does not meet the Ford 6.7L Powerstroke requirement.