2019 6.7L Cummins Engine Oil Weight?

[Sisupower]

What size tires do you have on the factory wheels? Is it lifted or leveling kit? Looks great

Stock wheels, 35x12.50R20 2” level kit in front!

Thanks I appreciate it.


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Cummin1 Any cutting to keep from rubbing?

08-19-2020

[cumminsturbofreak]

Just FYI guys, 15W40 is not recommended for the 2019+ trucks. I found that in a TSB.

They say that it causes deposit build up on the hydraulic lifters...

So use either 10w30 or 5w40 depending on climate.

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[Sisupower]

Just FYI guys, 15W40 is not recommended for the 2019+ trucks. I found that in a TSB.

They say that it causes deposit build up on the hydraulic lifters...

So use either 10w30 or 5w40 depending on climate.

Yeah I saw that when these trucks came out.


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[Murph]

I do the Rotella T6 15W-40. Summers are hot and there is something about the 5W-40 I don't like when it comes to heat. I do factory intervals of 15k without issues. Truck is deleted. Winters are not that bad where I want the lower viscosity. I use the Fleetguard Stratapore oil filter and the fleetguard fuel filters.

I am considering the Hot Shot Secret Diamond Outlaw oil but I haven't decided if the cost is worth it for me.

Right on.

My order of same just came and the jury will be outas they say $$$.

Yes had to swallow twice err ya'll know what I mean.

I'm 50 something and quite comfortable in my hetero self, LOL, but am told it's all that and a bag of fries.

We'll see.

Yes I enjoys me some self deprecation.

Happy hour starts now!

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[Cam95]

The 5th Gen trucks need 5w-40 or 10w-30 don’t use 15w-40 in it.

I have seen one issue so far with people using 15w-40.

I am tuning Schaffer’s 9000 5w-40 and a Mopar filter on 15k intervals and no issues at all at 50k.


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[SyN]

@Sisupower - I Retract my ramblings and state - In Texas run either of 3 HDEO viscosity's! (15W-40 / 5W-40 / 10W-30).

I won't go into brands - Today, HDEO is mostly of the Highest Quality (I personally am Not a fan of the ones with the SN Rating).

The hardest choice will be whether to go with a Conventional or Synthetic HDEO!

After researching these New High Output (HO) 6.7L - I can say ---> I would never have thought such a big powerful motor would be said to be HDEO viscosity sensitive - due to the so-called very tight / much smaller upper valve train clearances.

So a much lighter viscosity HDEO is recommended - 10W-30 (Nothing Wrong with this Viscosity).

I myself would have a hard time - being told I could only run 1 viscosity of HDEO in my new $80K HO 6.7L.

Those who are lazy and have the quick lube places change their filters and oils - beware and pay close attention to what viscosity is actually being poured into your expensive HO 6.7L.

Especially if you live in a freezing climate - most of the year!

I feel it's only the High Output 6.7L (Hydraulic Roller Lifters) - that is Oil Viscosity Sensitive. (What a Fiasco this will become)!

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[Sisupower]

I appreciate the input.

It sounds like everyone is on the same page.

My local Cummins dealer has a good stock of LF16035 oil filters, and I get a discount because I work for Cat.

So I think I will go with that filter.


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[bmcl1221]

I am in Central Florida.

I have a 2014 6.7L with 108k miles with full factory emissions.

I am looking at trying 15W40 Schaeffer full synthetic with added Zinc.

Any thoughts on this verse 5W40 synthetic?

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[Chrisn162001]

It may be a coincidence, maybe not, but all the lifter failures I’ve seen in the new 6.7s, the owners were using 15-40.

I’d stick to the 5-40 or 10-30 they call for.


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[SyN]

I am in Central Florida.

I have a 2014 6.7L with 108k miles with full factory emissions.

I am looking at trying 15W40 Schaeffer full synthetic with added Zinc.

Any thoughts on this verse 5W40 synthetic?

Schaeffers HDEO is all Top Tier - I would still be running the Series 9000 5W-40 - but my local dealer (Retired & Moved) away.

Their proprietary Penetro / Micron Moly is a very high quality (Friction Modifier).

His local (In Shop Prices) were very competitive with other High-End Synthetic HDEO ($26 a gallon) - Purchasing this same oil online is Ridiculously Expensive!

The newer OTR Plus 9000 5W-40 is a Very Stout / Robust oil - if you don't mind the higher costs.

I also added 1 16oz bottle of Moly EP #132 with every OCI - (Just my OCD)

My recommendation: Run either 15W-40 (Semi-Synthetic) or Their 5W-40 (Full/100% Synthetic) with Full Confidence!

Even Schaeffers OTR Plus 10W-30 would be a solid choice as well - even though you don't have the H.O. 6.7L.

NOTE: Best to find a Local (Jobber or Dealer) - Online prices are Stupid Ridiculous Expensive!

Just don't skimp on cheap filters!

Good Luck - Every Schaeffers Product is of the Highest Quality!

NOTE: Just my Opinion - If you have the High Output 6.7L (Limited to the the 1 Tons) - run only a HDEO 10W-30 or 5W-40.
If you have a regular lower output 6.7L - you can run any of the 3 HDEO viscosity's - I was told by my service MGR that the 10W-30 was only used for CAFE - MPG increase - If any increase is ever shown!
IF YOUR STILL UNDER WARRANTY - RUN WHAT YOUR MANUAL RECOMMENDS!

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