My 2022 UOA :(

[06 Dodge]

Just wondering what others think of this Cummins UOA for Rotella T-6 5w40 @4743 miles with DBL 7349 oil filter... I was not a happy camper when I read this in the comment: Viscosity is SIGNIFICANTLY LOW. I'm also surprised at the low base number of 4.05 being it stared at 10.6...

BTW this oil is from the dealership do to a big screw up last year... I am also surprised being I have heard of many others using this same oil in there 6.7 without problems or bad UOA reports

 

[AH64ID]

Looks like fuel is wreaking havoc on your oil. Have you noticed the oil level rising? 5% fuel dilution would equate to about 1/3” more volume on the dipstick.

Are you 100% positive they didn’t put 10w-30 in your engine?

How long ago was the oil change?

Any frequent regen issues?

 

[06 Dodge]

Looks like fuel is wreaking havoc on your oil. Have you noticed the oil level rising? 5% fuel dilution would equate to about 1/3” more volume on the dipstick.

Are you 100% positive they didn’t put 10w-30 in your engine?

How long ago was the oil change?

Any frequent regen issues?

The oil was in the engine just shy of one year... I have not noticed frequent regens, the last one I know about was some 600 miles ago while I still had the 800+ lbs of weight out of the bed...

I went to the dealer after I got the UOA report, talked to service manager, they swear they put 5w40 T-6 synthetic in it, my self I'm not sure they did ( or they got a back batch of bulk oil) based on the UOA and what Cummins had to say about viscosity...

It might be a good idea to go look up the specs of 10w30 to see its starting velocity & base number, this oil run I'm using Amsoil 5w40 ADO I bought last year and a LF16035 Strat as my Donaldson order was late and hope next UOA is better.

Oh yes I noticed oil growth on the dip stick ( was told its normal to see no newer 6.7 CTD ) that is how I accidently got the Rotella T6 installed last Nov as they were to get an oil sample for me ( but f'ed up and drained all the oil grrr) so I couls send it to Blackstone, that UOA showed 1.5% fuel in the oil with just @ 1396 miles on Amsoil 5w40 ADO, that is why I added 800+ lbs in the bed to help the engine to work a bit more, I don't have have a trailer to keep it hooked to at this time

More Q's are welcome, it not only helps me to learn but it may help others too.

TIA,
Charles

 

[06 Dodge]

Another question would a steady diet of burning 5% Bio diesel have any effect on the fuel that has gotten in the oil? The nanny state of OR mandates we use it , the only time I was okay with 5% bio was when I was towing on a long run in my old 06 5.9...

 

[Diesel85]

I did some reading and from what it looks like RAM says 5-7% oil dilution is normal for the 6.7l.

From doing more reading, the higher the percentage of biodiesel used, the higher the dilution will be, along with more regenerations depending on usage.

I'm assuming RAM means 5-7% using standard #2 diesel. If one would follow a trend line on a graph, it would likely be around 6-8% oil dilution for B5 mix.

With that being said, I'm curious to see what mine is in my EcoD and in my Kubota turbo diesel. Will give me a good baseline on the health and possibly quality of the local diesel fuels.

When I had my 2002 5.9l I did one Blackstone on it somewhere around 150k and I think it only had 2% fuel dilution. But we are talking a totally different animal of an engine.

Curious to see what other folks have to say.

My company's 6.7l trucks when I occasionally check the oil, they are always in the "safe" area.

 

[06 Dodge]

I am surprised & an unhappy camper to see what you posted about the 5-7% oil dilution being acceptable and a bit more for Bio all the more reason to dislike this nanny state... I have read of others who use Rotella T-6 5w40 in the newer 2019+ 6.7L and have not reported UOA's like mine... Wish I knew what I could do to help correct this problem, but then I was also recently told growing oil was normal for the 6.7 I hope its BS...

I have 12 years of experience with Rotella T6 5w40 in my old 06 and all of the UOAs I took not one of them ever showed more then 0.5% fuel in oil and the first years of the engines life it lived on Amsoil HDD 5w30, I had few who said it would kill the engine in 10K, but at 150K its still running strong according to the new owners...

Hope all have a great turkey day....

 

[Timd32]

Just curious, who did the recent change and took the sample from T6 to Amsoil?

How many total miles on your rig?

 

[06 Dodge]

Just curious, who did the recent change and took the sample from T6 to Amsoil?

How many total miles on your rig?

At the time of UOA 9315 total miles on truck, the dealership took the resent sample when doing the oil change, I had them install my Amsoil 5w40 ADO & LF 16035 oil filter. Last year dealer installed Rotella T-6 5w40 due to a screw up where the shop drained all of my oil instead of just getting me a sample, yes I know do it your self is best, but when you have a lower spine injury you have to farm out some things to others that ya can afford. Last year local diesel shops wanted $150 to install my oil & filter ouch, the dealership was $50.0... The dealership even with new price increase is now only $75.00 an a tire rotation is up to $39.00, but they now get $97.5 to change the rear fuel filter ouch....

 

[Timd32]

Nah, I'm not a DIY for all the stuff I have, no time to enjoy it, we have 32 vehicles currently, it's a bunch for work stuff obviously not all my personal rides. Only 2 Diesel trucks in the fleet.

The '22 6.7 was more of an experiment for me to see how it would work out being a daily driver. It's not happy during certain months with the Re-gens.

I will ask them to pull a UOA, or provide them the kit is what I used to do on my 6.4, I'm not going to change it, I don't have the time right now and it needs to be done.

Was not sure if it was all the same shop.

I think you start fresh here with the Amsoil and do the UOA and see where it goes.

I would also run it and enjoy it. I'm @ 15k miles, so was just curious. I love the power and the truck overall, nothing keeps me up.at night, it makes oil, does crazy regens, has a few small recalls, but really for the times we're living in, it's a pretty wonderful rig, the technology behind the modern controls is pretty wild vs my '96 12V.

 

[Cummins12V98]

Two 12V's, one 24V and two 6.7's every sample showed less than 1%.

 

[Ozymandias]

I had a bad viscosity with Rotella T6 too this spring.

 

[06 Dodge]

I'm surprised to hear this being I ran Rotella T-6 5w40 synthetic in my old 06 5.9 without any problems for 12 years with Donaldson DBL 7349 oil filters until its last oil change in 2021, all the UOA's I ran on it up to late 2017 when I stopped doing them always came back good to go, I would put between 7500 an 10K on the oil over 12 to 14 months, fuel in the oil was never over <0.5 and this was during its time in north Iowa where it saw hot humid summers and cold subzero temps in the winter...

 

[bcbender]

I've got bottles of all my oil changes filled in the Blackstone mailers just never sent them off, I am not sure if I want to as it seems like it might cause me an ulcer.I have to change my oil annually for the warranty so not sure how much benefit there would be unless I want to track it for future extended service intervals.. I have been running T6- 5w40 in this new 6.7 since I bought it, has anyone else seen issues? My last change was only about 5k miles so I am probably ok, but most folks are just dumping it in and not checking... I'll be following this for sure.

 

[Cummins12V98]

Two 12V's, one 24V and two 6.7's every sample showed less than 1%.

Actually less than 0.5%

 

[Ozymandias]

I switched to Valvoline 5W-40 Extreme Diesel after that experience and won't go back to Rotella.

 

[06 Dodge]

I switched to Valvoline 5W-40 Extreme Diesel after that experience and won't go back to Rotella.

I had a bad viscosity with Rotella T6 too this spring.

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Blackstone maybe okay to use for gas engine but my self have no trust in them when it comes to diesel UOA's not only based on other CTD owners I have talked but I was also taught by the company I drove long haul for years ago to only trust Fleetguard, Cummins or Cat when it comes to UOA's, so I stay with what I know. And by buying from Cummins direct the UOA's kits save ya lot of $$$$ at $16.21 each compared to Blackstone, the Cummins kits are sometimes in limited supply so I buy at least 5 as I also teste the wife's DI Toyota engine...

 

[AH64ID]

TBN being low isn’t a surprise on 12 month old oil as TBN starts to deteriorate as soon as you start the engine the first time, and will deteriorate even with low use and when the oil is sitting.

5% max is what Cummins recommends for fuel in the oil, same as Ram in the owners manual. I understand that the variable OCI is based on that approx fuel level, if it comes due before 15K miles.

The 6.7’s are more prone to fuel dilution based on how they actively regenerate.

B5 is not supposed to have any impact on oil life, but B6-B20 reduces the oil change interval to 6 months because of the potential for excessive fuel dilution. I personally doubt that there is a magic line at B5, so reducing your OCI may be prudent for B5.

 

[06 Dodge]

TBN being low isn’t a surprise on 12 month old oil as TBN starts to deteriorate as soon as you start the engine the first time, and will deteriorate even with low use and when the oil is sitting.

5% max is what Cummins recommends for fuel in the oil, same as Ram in the owners manual. I understand that the variable OCI is based on that approx fuel level, if it comes due before 15K miles.

The 6.7’s are more prone to fuel dilution based on how they actively regenerate.

B5 is not supposed to have any impact on oil life, but B6-B20 reduces the oil change interval to 6 months because of the potential for excessive fuel dilution. I personally doubt that there is a magic line at B5, so reducing your OCI may be prudent for B5.

I was more than a bit surprised at the TBN being 4.05 after 12 months, in my 06 5.9 even after 14 months of a humid summer & harsh north IA winter I never saw that low of a TBN number from 5w40 Rotella T-6... IIRC the lowest I recall for TBN was 5.X after 14 month/10K, that means I have to learn all over again with this new fangled 6.7.

Thanks to everyone for trying to help educate me...

Charles

 

[AH64ID]

I was more than a bit surprised at the TBN being 4.05 after 12 months, in my 06 5.9 even after 14 months of a humid summer & harsh north IA winter I never saw that low of a TBN number from 5w40 Rotella T-6... IIRC the lowest I recall for TBN was 5.X after 14 month/10K, that means I have to learn all over again with this new fangled 6.7.

Thanks to everyone for trying to help educate me...

Charles

Modern oil specs, CJ-CK, start with a lower TBN because it’s not needed with ULSD. I never tested CK in my 05, bit the CI I ran would be in the 7-9 range after 12 months of use.

I haven’t tested my 6.7’s but I expect a much lower TBN after a year based on how the oils are designed.

 

[sag2]

The only way to confirm the TBN is to sample new oil. That is why I always used SGS Herguth Labs in Vallejo CA. They compare the oil to a new sample so you know exactly where you started from.