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UOA article - what is "normal" #2780790 10/23/12 03:59 AM
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dnewton3 Offline OP
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Last edited by dnewton3; 10/23/12 04:45 AM.

The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
Re: UOA article - what is "normal" [Re: dnewton3] #2780862 10/23/12 07:10 AM
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A_Harman Offline
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Is that an article that you have just posted, or has it been on BITOG for a while? Regardless, thanks for the educational read!


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Re: UOA article - what is "normal" [Re: dnewton3] #2780889 10/23/12 07:41 AM
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Samilcar Offline
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Great article.

Re: UOA article - what is "normal" [Re: A_Harman] #2781094 10/23/12 10:35 AM
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dnewton3 Offline OP
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Originally Posted By: A_Harman
Is that an article that you have just posted, or has it been on BITOG for a while? Regardless, thanks for the educational read!


Wrote the bulk of it this month on vacation; been in editing and formatting for about a week.


The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
Re: UOA article - what is "normal" [Re: dnewton3] #2781368 10/23/12 02:27 PM
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ltslimjim Offline
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Very nice. thumbsup


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Re: UOA article - what is "normal" [Re: dnewton3] #2781508 10/23/12 04:49 PM
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DanMiller Offline
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Very good article, what oil do you like based on all of the UOAs you have seen ? Are you a thick or thin oil believer ?

Re: UOA article - what is "normal" [Re: dnewton3] #2781539 10/23/12 05:19 PM
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OVERKILL Offline
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Excellent article thumbsup


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Re: UOA article - what is "normal" [Re: dnewton3] #2781562 10/23/12 05:35 PM
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JAG Offline
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Thank you for the great article, Dave!

Re: UOA article - what is "normal" [Re: dnewton3] #2781611 10/23/12 06:12 PM
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buster Offline
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Thanks Dave! thumbsup


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Re: UOA article - what is "normal" [Re: dnewton3] #2781850 10/23/12 11:35 PM
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DanMiller Offline
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Since leaving Oil in longer is better for wear numbers would it make sense to change the Oil filter in between Oil changes ?

Re: UOA article - what is "normal" [Re: dnewton3] #2781854 10/24/12 12:12 AM
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Clevy Offline
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That was a great article. Very enlightening. Wear rates going down as the oil gets more miles was very informative. Thank you for the enlightening information.


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Miles x 2 per oil filter
Re: UOA article - what is "normal" [Re: dnewton3] #2782578 10/24/12 05:13 PM
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fdcg27 Offline
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Really informative.
We here tend to get all excited about small differences in wear metals per thousand miles, but you have put it in perspective.
Maybe the only real use of UOAs is to find gross anomalies, like coolant leaking into the engine oil, or TBN and TAN as well as shear to determine oil life.


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Re: UOA article - what is "normal" [Re: DanMiller] #2782700 10/24/12 06:50 PM
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Quattro Pete Offline
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Originally Posted By: DanMiller
Since leaving Oil in longer is better for wear numbers would it make sense to change the Oil filter in between Oil changes ?

Why? Filter efficiency increases with age/miles as well.

Only if you have a seriously sludged up engine that you should change filter more frequently, but then you should not be running extended OCIs either.


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Re: UOA article - what is "normal" [Re: Quattro Pete] #2782944 10/25/12 12:22 AM
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Originally Posted By: Quattro Pete
Originally Posted By: DanMiller
Since leaving Oil in longer is better for wear numbers would it make sense to change the Oil filter in between Oil changes ?

Why? Filter efficiency increases with age/miles as well.

Only if you have a seriously sludged up engine that you should change filter more frequently, but then you should not be running extended OCIs either.

I agree. I'm thinking about leaving cartridge oil filter in the E430 for 2 OCI's of 10-12k miles each OCI. I will inspect the oil filter carefully on the next oil change and re-use it if the filter is in good shape and I don't see any debris. The capacity of the fleece filter is more than 10 grams, it is not possible for the engine to generate more than 2-3 grams in 10k miles.


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Re: UOA article - what is "normal" [Re: dnewton3] #2782965 10/25/12 03:52 AM
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dnewton3 Offline OP
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The only way to know for sure it to get some PCs done (particle count analysis).

However, I would contend this; the OEM typically is as conservative with the FCI as they are the OCI.

There are a few notable exceptions. One such example is my (new to me) 2000 Galant with 2.4L engine. The "normal" OCI is 7.5k miles and the FCI is every other oil change, hence every 15k miles. That is with any filter that meets their OEM specs. And there are a whole host of filters from Purolator, Wix, Fram, etc that meet/exceed those specs, right on Wally's shelf. I am not saying all FCIs can be extended that far, but I am saying that as long as your UOA is showing good lube and engine health, the FCI should be able to at least go as long as the OCI. Only if your soot/involubles/oxidation were the drastically escalate in the UOA, would it indicate a need for FCI.

For my vehicles in warranty, (which I'm now down to only one), I am following the OEM criteria for O/FCIs. But for my other stuff, I'm beginning to push even the "normal" OCIs out and using the same filter for that duration.

I am going to put my money where my mouth is, too. I have an upcoming trip out west; we'll be taking my 1995 Villager that has 225k miles on it, and an estimated 6k on the oil by the time we leave. I expect it will have near 10k miles on the lube when we return. I look forward to seeing the UOA when I get back. Am I nervous? You bet I am; I'm always nervous a bit when I try something new. But I have faith in my data streams and SAE studies I've read. This is solid science; just because it's hard to believe, do not make it untrue.

Last edited by dnewton3; 10/25/12 03:55 AM.

The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
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