P66 Victory 10w40 Diesel Aviation Oil used in CR diesel applications.

Neither is P66. I’m asking why is it relevant that one oil is highly regarded here that has no API certifications and another oil isn’t and the reason is it has no API certifications. That is illogical.
That's because most engine oils being discussed are designed for terrestrial vehicle engines, not aviation engines, which seems logical to me.

One should never use a terrestrial vehicle engine oil in an aviation engine and vice versa.

Aviation engine oils, whether gas or diesel, have vastly different requirements for base oils and additives compared to terrestrial vehicle engine oils.
 
So consensus is that you shouldn't, but what did P66 say? I'm going to guess you will be told no as they wouldn't want the liability.. but maybe give it shot and get a VOA and some UOAs for the oil people.
A VOA or UOA won’t give you any information whatsoever about the oil’s suitability. That’s what the certifications/approvals are for. The elements shown on an OA have no value other than verifying it meets the minimum/maximum amounts for certain specs, not how it will perform.
 
A VOA or UOA won’t give you any information whatsoever about the oil’s suitability. That’s what the certifications/approvals are for. The elements shown on an OA have no value other than verifying it meets the minimum/maximum amounts for certain specs, not how it will perform.

I wasn't worried about suitability for the OA, nor expecting an OA to confirm it. However, the VOA could show us what's in it and in comparison to actual HDEOs- again not to say it is suitable or not, just what's in it. And with the UOA, should he have other samples, perhaps we could see how things changed with his motor. Kind of like when someone switches to HPL and posts a UOA and you get a bunch of comments saying how great the motor is wearing and yada yada.

If he wants to give it a shot, regardless of the nays and boos from BITOG, we could at least get some data out of it. Could be interesting. I'd say more interesting than someone's 17th UOA from a 5k mile OCI on their 2.5L Toyota engine with the same oil for the past decade.
 
However, the VOA could show us what's in it and in comparison to actual HDEOs- again not to say it is suitable or not, just what's in it.
A $30.00 VOA won't show you all the chemistry that is in it; that takes an expensive Forensic analysis to determine it.

But hey, it's the OP's money so if he wants to do a VOA, it's his choice if he is still curious.
 
Correct. Just like the $30 VOA on an actual HDEO we would be comparing it against.
@CleverUserName "A $30.00 VOA won't show you all the chemistry that is in it; that takes an expensive Forensic analysis to determine it."

If you can't compare all the chemistry in both what do you hope to glean from it? Unseen chemical compounds play a crucial role in differentiation.
 
I don’t know what you’re asking. Data gleaned would be the same spectrographic analysis we use for all VOA and UOA samples. If the additive chemistry looks strange or out of the normal balance for metallic additives added to HDEOs.
I am not asking anything, just making a true statement.

You may have missed this: "If you can't compare all the chemistry in both what do you hope to glean from it? Unseen chemical compounds play a crucial role in product differentiation."
 
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This oil should be incompatible because it don`t have API rating so you kinda don`t know what you get, viscosity are kinda on par with oil for land vehicles though. What is your goal by trying this oil? More protection, cleaner engine or just try to save some cash? Either way, if you don`t mind potentially ruining your car i think for the sake of mad science you should try that oil and perhaps get oil analysis for fun.
 
Neither is P66. I’m asking why is it relevant that one oil is highly regarded here that has no API certifications and another oil isn’t and the reason is it has no API certifications. That is illogical.
Because you are taking their recommendation. Does P66 recommend that oil for your application?

Your whole basis here is what is illogical.
 
I’ve been advised by P66 aviation technical staff.

The additive chemistry is not consistent with on road diesel engine chemistry. It is not recommended for non aviation use and may be incompatible with other chemistries used with on road diesel engine oils.
Not meaning to be rude, but of course not. If they had said differently then I would have suspected their technical knowledge or their product formulations.
 
Not meaning to be rude, but of course not. If they had said differently then I would have suspected their technical knowledge or their product formulations.


I agree with you and it’s what I was thinking in general. But I have a short cut to anyone in P66 because they have to answer my emails. And I’m going to get more of an answer than just the tech hotline people.

It’s not a CK4 / CJ4 / CI4 additive package repurposed in a full synthetic base oil. It’s a ground up additive package. I’m guessing more akin to a gas compressor oil, than an HDEO oil.

That being said, it’s really, really, expensive in quarts. If OP wants to spend $150 or more for 3 gallons in quarts, I mean… go mad scientist and figure it out.


But for about $20-25 you can just buy… 5w40? Or… about anything else full synthetic HDEO wise.
 
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