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New CP8 Pump--Do you use Fuel Additive to increase lubricity?

MacksRam

MacksRam

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As you know the 2025 Ram's have the new CP8 Diesel Injection pump--it seems to me that it would be wise to run a Fuel additive to increase the "lubrication" of the internals of this pump.
I checked with my local Authorized Cummins Repair shop (they are NOT a Stellantis Ram dealer, but they do service Ram trucks) to get their input on this. They frequently rebuild injection pumps on older Ram trucks.
The Service guy there said he does recommend a Fuel Additive in ALL Ram Diesel trucks---he said it is certainly a benefit. Yes, it is kind of expensive, but worth it to prolong the life of the CP8. Your thoughts?
 
I would also recommend it as I use an additive in my 26, it also helps with killing bacteria, keeping injectors clean, helps the fuel atomize. For the colder climates, an additive with anti gel will keep it flowing.
 
A good diesel fuel additive is always a good idea today. If for no other reason than to improve the lubricity of the fuel, which in turn reduces wear and tear on the fuel system.

Lake Speed Jr. did some excellent work demonstrating why this is important on his YouTube channel. Fuel has to meet minimum standards for lubricity and wear-scar testing. The bare minimum is where much of the fuel lives when it’s delivered to the pumps. Based on the testing he did, Archoil AR6500 and OptiLube XPD came out on top.

I use an additive in every gallon of diesel I consume in all of my trucks and equipment, and would encourage others to do the same. The AR6500 performed extremely well in my 2022. Significantly reduced soot-loading in the DPF and increased time between active regeneration cycles. Based on Lake’s work, it’s also very good at increasing lubricity. It was his “best bang for your buck” recommendation.
 
Based on the forums/facebook groups I've decided that I will be running Archoil 6500 summer/warm, and 6300 in the colder months, with a 6400D every few thousand miles. It's not THAT expensive considering the headaches it might prevent down the road.
 
mbarber84 said:
A good diesel fuel additive is always a good idea today. If for no other reason than to improve the lubricity of the fuel, which in turn reduces wear and tear on the fuel system.

Lake Speed Jr. did some excellent work demonstrating why this is important on his YouTube channel. Fuel has to meet minimum standards for lubricity and wear-scar testing. The bare minimum is where much of the fuel lives when it’s delivered to the pumps. Based on the testing he did, Archoil AR6500 and OptiLube XPD came out on top.

I use an additive in every gallon of diesel I consume in all of my trucks and equipment, and would encourage others to do the same. The AR6500 performed extremely well in my 2022. Significantly reduced soot-loading in the DPF and increased time between active regeneration cycles. Based on Lake’s work, it’s also very good at increasing lubricity. It was his “best bang for your buck” recommendation.
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mbarber84,
Thank you. I am going to read up on Archoil AR6500--I never heard of it. I really like the part about "Significantly reduced soot-loading in the DPF and increased time between active regeneration cycles."
I did a little research on OptiLube XPD in the past---something about potassium content held me up on this one..
 
MacksRam said:
mbarber84,
Thank you. I am going to read up on Archoil AR6500--I never heard of it. I really like the part about "Significantly reduced soot-loading in the DPF and increased time between active regeneration cycles."
I did a little research on OptiLube XPD in the past---something about potassium content held me up on this one..
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I’ve seen several additives, Archoil included, increase the potassium in the engine oil. I’m assuming it’s a byproduct of using the additive. As long as you’re dosing the additive properly, using a high quality engine oil, and changing the oil regularly, I don’t see it as a major concern.
 
mbarber84 said:
I’ve seen several additives, Archoil included, increase the potassium in the engine oil. I’m assuming it’s a byproduct of using the additive. As long as you’re dosing the additive properly, using a high quality engine oil, and changing the oil regularly, I don’t see it as a major concern.
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And if you follow the Oil Geek, in his oil testing lab the potassium presence looks like a head gasket leak. I switched to Power Service fm Hot Shot’s EDT additive because of that - I send my samples to his lab.
 
LuckyK said:
And if you follow the Oil Geek, in his oil testing lab the potassium presence looks like a head gasket leak. I switched to Power Service fm Hot Shot’s EDT additive because of that - I send my samples to his lab.
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Correct, however you will usually see sodium levels begin to rise parallel with potassium when there’s coolant intrusion into the engine oil. A spike in potassium with no significant corresponding sodium rise would typically be a sign of the additive in use.

Power Service is a marginal additive based on the testing lake did. Not a whole lot of improvement for the money spent. I tried hotshots EDT for months upon months and saw no appreciable gains. In fact, it seemed plausible that their additive actually increased my soot loading and reduced time between regen cycles. When I stopped using it the truck “cleaned up” a little. Not a fan of that stuff.
 
mbarber84 said:
Correct, however you will usually see sodium levels begin to rise parallel with potassium when there’s coolant intrusion into the engine oil. A spike in potassium with no significant corresponding sodium rise would typically be a sign of the additive in use.

Power Service is a marginal additive based on the testing lake did. Not a whole lot of improvement for the money spent. I tried hotshots EDT for months upon months and saw no appreciable gains. In fact, it seemed plausible that their additive actually increased my soot loading and reduced time between regen cycles. When I stopped using it the truck “cleaned up” a little. Not a fan of that stuff.
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I am not a fan of their regular EDT, but their winter defense is top notch as far as keeping fuel from gelling.
 
Trash Panda said:
There is no product made by Archoil called “6500D”
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Sorry...AR6500. Not rocket science to understand what I was referencing but thanks for the input ;)

www.archoil.com

AR6500 Diesel Treatment

Boost performance and fuel economy with AR6500 Diesel Treatment. Improve cetane, enhance lubricity, and keep your fuel system clean. Buy now for a more efficient engine.
www.archoil.com www.archoil.com
 
securityguy said:
Sorry...AR6500. Not rocket science to understand what I was referencing but thanks for the input ;)

www.archoil.com

AR6500 Diesel Treatment

Boost performance and fuel economy with AR6500 Diesel Treatment. Improve cetane, enhance lubricity, and keep your fuel system clean. Buy now for a more efficient engine.
www.archoil.com www.archoil.com
Click to expand...
Wasn’t trying to be a dick, I’ve just seen people confused by less.
 
Trash Panda said:
I absolutely agree.

However, a short trip into public will let you know that is absolutely not out of the realm of possibility. Lol
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The bigger issue IMHO, is the dumb search engine bot scrapers picking up the wrong info and regurgitating it through their "AI." Accuracy matters.
 
Brutal_HO said:
If you're still confused after visiting Archoil's web site, well...

View attachment 92429
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If I had a nickel for every time I’ve wanted to hang this exact sign over my office door at school, I’d be a millionaire. The only thing keeping me from doing it is the fact that I’m not a millionaire.
 
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