Oil Change Interval

[CToney]

Ram recommends 500 hour 24,000 km 12 month oil change interval
I did my first oil change at 10,000 kms 150 hours.

My truck tows 75%+ of the time and since it has EGR I’m not comfortable with longer oil changes. Only 11.4L as well, My Ecodiesel has 16,000km recommended interval with 10L of oil. It has less displacement and smaller oil filter. I’m ok with that interval as I never tow. I change it at 15,000 kms.

 

[Tuesdak]

Dump the diff oil early as well as that is a known poor OEM oil.

Other than the first oil change you can run some UOA and reassure yourself the oil is doing ok for the longer miles. 12 months or 24,000km anything sooner is simply a waste of your money. The GM designed Light Duty Ecodiesel is a different class of light oil than the Industrial Cummins. See those wimpy electric fans, yeah, Light Duty.

Use the best oil filter you can get as it is a life limited item more than oil anymore. And a bad/failed one can take an engine out.

We would get 10,000 miles, 16,093 km out of the non-DEF EGR blasted 2008 Duramax towing 550 miles a day. UOA said oil was done at that mileage the Oil Change Indicator went off. The worst, dirtiest, engine I owned was the non-EGR GM 6.5TD IDI needing an oil change at 2500 miles, 4023 km, by the owners manual towing and another 500 miles was nasty on the UOA.

 

[AH64ID]

500 hours is the standard OCI on industrial 6.7’s. I wouldn't worry about the “long” intervals.

I hit 15K miles on my oil today. It’s getting changed this week. Right at 460 hours. Amsoil DME and a Donaldson DBL7349. Towing about 30% of the time, but I would run the same interval with more towing.

As for the EGR the harder you work the motor the less the EGR is used. Around 60% load on my engine the EGR is closed.

 

[gtwitch]

I am getting ready to drop the Diff oils in my 2016/7 2500 and change and plan on using AMSOIL Severe Gear 70-90 in both ends and have used that in my 99 CTD and it has 250k on i now with no issues in the Diffs.
gtwitch in wyoming

 

[gtwitch]

My 2016/17 2500 has 36K on it now and winter is coming so engine oil is due ,so get the Diffs at the same time. I think the auto trans can go till at least 50K , I think book says 60K on Auto trans oil and filters?
gtwitch in wyoming

 

[JR]

The 68RFE calls for 60k mile intervals severe duty, 120k miles normal. They don't share what they consider normal use and severe so I change at 60k.

 

[bcbender]

AISIN is 30k for the trans service,,, going to do my service next weekend, just hit 14450 mi so engine oil (second time) fuel filters and diff oil.

Question John, did you dump your front diff also early? I have only used 4x4 but twice and only for a few hundred feet so its had 15k miles since new "coasting"

 

[Cummins12V98]

Not as much of an issue changing the front if 4wd is not used much. I changed my 15 at 24k and it looked new.

 

[AH64ID]

My 2016/17 2500 has 36K on it now and winter is coming so engine oil is due ,so get the Diffs at the same time. I think the auto trans can go till at least 50K , I think book says 60K on Auto trans oil and filters?
gtwitch in wyoming

Why list it as a 2016/17?? Unless it was built by Johnny Cash.

AISIN is 30k for the trans service,,, going to do my service next weekend, just hit 14450 mi so engine oil (second time) fuel filters and diff oil.

Question John, did you dump your front diff also early? I have only used 4x4 but twice and only for a few hundred feet so its had 15k miles since new "coasting"

I did. I always change them together, regardless of number of miles in 4wd. The carrier still spins while driving, just the driveshaft doesn't.

 

[bcbender]

Why list it as a 2016/17?? Unless it was built by Johnny Cash.

I think he was saving that for the headlights wont come on post... (all three of em)

 

[bcbender]

Not as much of an issue changing the front if 4wd is not used much. I changed my 15 at 24k and it looked new.

Agreed, however since there is such a lack of confidence in the factory fill, I will swap them both for AMZOIL Severgear 75W90 and be done with the OE fill, then evaluate from there. Not really shopping for another truck anytime soon so its kinda cheap insurance.

 

[JR]

Regarding the front, provided the level hasn't increased indicating contamination I will pull a small sample and evaluate the fluid when I change the rear. I use 4x a fair amount and have historically been able to easily go 2 to 3 services on the rear to one front service. Even at that interval the oil generally comes out pretty clean looking.
Modern oil has proved very durable and shear resistant with many manufacturers utilizing fill for life diffs, and that is on units that are transmitting power 100% of the time.

 

[Cummins12V98]

Agreed, however since there is such a lack of confidence in the factory fill, I will swap them both for AMZOIL Severgear 75W90 and be done with the OE fill, then evaluate from there. Not really shopping for another truck anytime soon so its kinda cheap insurance.

Good call

 

[gtwitch]

my 2016/17 was built as a 2016 in Nov 2016 and sold to the previous owner in Feb 2017 and is titled a 2017 to me, so call me J. Cash if you want. I know, that is interesting and if I trade it off , maybe it will be a 2017 to the next owner, who knows? Only the Shadow knows.
gtwitch in wyoming

 

[AH64ID]

my 2016/17 was built as a 2016 in Nov 2016 and sold to the previous owner in Feb 2017 and is titled a 2017 to me, so call me J. Cash if you want. I know, that is interesting and if I trade it off , maybe it will be a 2017 to the next owner, who knows? Only the Shadow knows.
gtwitch in wyoming

That doesn’t make it a 2016/2017, it’s a 2017. Any truck build in Nov of 16 is a 2017. 2016’s likely stopped being built around June of 2016. This happens every year with most manufacturers.

The date it was built is not the important date, that’s why it’s called a model year, not a calendar year.

My 05 was built in Nov of 04, but it was just called an 05.
Dads 06 was built in Sep of 05, it’s a 06.

 

[Topzide]

Anything produced after Aug 30th of the calendar year is considered the following year model. Anything before that date stamp is usually considered a half model current year. At least that's what they used to do when I worked at dealers. Maybe someone else can chime in with current practice. JM2C

 

[slowmover]

500 hours is the standard OCI on industrial 6.7’s. I wouldn't worry about the “long” intervals.

I hit 15K miles on my oil today. It’s getting changed this week. Right at 460 hours. Amsoil DME and a Donaldson DBL7349. Towing about 30% of the time, but I would run the same interval with more towing.

As for the EGR the harder you work the motor the less the EGR is used. Around 60% load on my engine the EGR is closed.

Industrial tends to mean fixed rpm. Next to no idling. If the engine is running it has a load against it (thus low DEF burn).

But I wouldn’t use that hours number for a pickup. Acceleration thru gears a whole other world.

No comment about anyone’s OFL number. Just looking for clarity about industrial versus road vehicle.

There’s some fine print to explore.

 

[AH64ID]

But I wouldn’t use that hours number for a pickup.

Why not? It’s the published number from Ram/Cummins for the ISB in these modern trucks.

My point was that 500 hours in the pickup isn’t an uncommon for this engine in any application.

This engine is used in other wheeled applications too, guess what 500 hours.

 

[JR]

But I wouldn’t use that hours number for a pickup. Acceleration thru gears a whole other world.
.

Cummins recommendation in the 19+ Ram is 500 hours.

Industrial tends to mean fixed rpm

Lots of industrial equipment runs from idle to load and back, gensets and boats excluded.

 

[AH64ID]

Cummins recommendation in the 19+ Ram is 500 hours.
.

It’s been a lot longer than 19, since at least 2013.