Oil change help!!

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Long hauler

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Okay, so I have 2019 Ram 2500 Cummins 6.7. I’ve been changing oil and using Rotella T6 15w-40. Currently have 110,000 miles and been using this oil for the last 80,000 miles. I’ve noticed my engine having the idle tick and sounding rougher when driving. Did some digging and realized I’ve been using the wrong oil this entire time. I’m changing to recommended but have I already done the damage? Will it help fix the deposits on the valve lash I read about? I’m due for next oil change now and want to make sure.
 

crash68

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At this stage all you can probably do is start running a 5W40 oil, and have the current oil tested.
Truthfully most of the grief running a 15W-40 in the +'19 Cummins probably is cold weather related but that's just a speculation. It's possible the "thicker" oil doesn't move fast enough or enough volume causing the problem with hydraulic lifters overtime.
 

18CrewDually

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Okay, so I have 2019 Ram 2500 Cummins 6.7. I’ve been changing oil and using Rotella T6 15w-40. Currently have 110,000 miles and been using this oil for the last 80,000 miles. I’ve noticed my engine having the idle tick and sounding rougher when driving. Did some digging and realized I’ve been using the wrong oil this entire time. I’m changing to recommended but have I already done the damage? Will it help fix the deposits on the valve lash I read about? I’m due for next oil change now and want to make sure.

When the noise increases and you start getting a misfire code, then you know it's time to park it and get the valve train inspected.
 
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Long hauler

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Thank you for the responses. I’m going to run the 5W40 for a while and just see what happens.
 

Gr8bawana

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I think you will have zero problems going forward.
 

truck2569

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Okay, so I have 2019 Ram 2500 Cummins 6.7. I’ve been changing oil and using Rotella T6 15w-40. Currently have 110,000 miles and been using this oil for the last 80,000 miles. I’ve noticed my engine having the idle tick and sounding rougher when driving. Did some digging and realized I’ve been using the wrong oil this entire time. I’m changing to recommended but have I already done the damage? Will it help fix the deposits on the valve lash I read about? I’m due for next oil change now and want to make sure.
Do you use any oil supplements like Lucas oil additive That would probably take your tick away because it coats the internals of the engine for cold starts. Just my point of view. I use full Synethic 5w40 Rotella in mine.
 
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