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NAPA 0w-20 UOA Mazda6 2.5L 5000 miles #5226507 09/30/19 01:41 PM
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Elkins45 Offline OP
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Like the thread title says, this is a UOA for a 5000 mile interval using the NAPA 0w-20 synthetic, which is produced by Valvoline. The car is a 2016 Mazda6 with the 2.5L Skyactiv engine with 41000 miles. This is the first sampling from this car and it looks like I could have comfortably taken it a few more miles.

[Linked Image]

Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226519 09/30/19 01:57 PM
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PimTac Offline
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That is a great looking report. Iā€™m curious as to where the sodium came from though? I thought that Napa(Valvoline) had deleted that when d1G2 came into effect.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226527 09/30/19 02:06 PM
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buster Offline
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Nice report. Mazda 2.0/2.5 are great engines.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226543 09/30/19 02:16 PM
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Mad_Hatter Offline
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Wow.. you sure you ran that oil?šŸ˜‚..jk...Very nice šŸ‘Œ

Last edited by Mad_Hatter; 09/30/19 02:16 PM.
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: buster] #5226634 09/30/19 03:50 PM
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Mr Nice Offline
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Originally Posted by buster
Nice report. Mazda 2.0/2.5 are great engines.


Yep. Too bad Honda canā€™t build a non turbo engine similar to the SkyActiv engines.


Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226667 09/30/19 04:28 PM
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Direct_Rejection Offline
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Elkins45, this is as clean of a report as anyone could ever hope for.

A little dab of moly...a big dab of boron.

Mazda6. Nice, beautiful sled.

Thanks for sharing.

NAPA value...it's a thing.

Last edited by Direct_Rejection; 09/30/19 04:30 PM.

2019 Lexus UX 250h F Sport
PP 0W16
ILSAC GF-6B
"Backward oil is not compatible."
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226790 09/30/19 06:38 PM
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Railrust Offline
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Wow, even the house blend synthetics are looking good nowadays, with the moly and boron. Wasn't long ago that wasn't the case.

Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226792 09/30/19 06:39 PM
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ZZman Offline
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Add pack looks good. Even has Titanium.


2003 Mercury Grand Marquis.
2007 Hyundai Santa Fe AWD.
2005 Toyota Avalon XLS
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226821 09/30/19 07:14 PM
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Elkins45 Offline OP
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I bought three cases of it when it was on sale in January for $2.99/quart. When it goes on sale in 2020 I will probably pick up a couple more. I can do an oil change with a factory Mazda filter for $23 so I have no complaints.

Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5226846 09/30/19 07:34 PM
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Mad_Hatter Offline
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Originally Posted by ZZman
Add pack looks good. Even has Titanium.

Seems Valvoline threw in a little bit of everything and it appears to be working. The 100c kv is right where it should be and there's reserve TBN; I'd be surprised if this lube couldn't do 7k in this engine.

OP, this Napa 0w20 just might be your go to lube.šŸ‘

Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5227122 10/01/19 05:03 AM
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dnewton3 Offline
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Great report! Very low wear. Low contamination.

Soooooooooo .... Elkins45, what did you learn from the UOA? I mean, what did you discover that will lead to actionable choice?

Last edited by dnewton3; 10/01/19 05:04 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: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: dnewton3] #5227168 10/01/19 06:20 AM
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Elkins45 Offline OP
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Originally Posted by dnewton3
Great report! Very low wear. Low contamination.

Soooooooooo .... Elkins45, what did you learn from the UOA? I mean, what did you discover that will lead to actionable choice?


The reason for doing it was to learn two things:

1. Is it actually a good quality oil suitable for long-term use (the answer seems to be yes)
2. Does it hold up to a 5K change interval? (it seems like it could go to 6K comfortably)

Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5227317 10/01/19 09:16 AM
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Mad_Hatter Offline
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Originally Posted by Elkins45
Originally Posted by dnewton3
Great report! Very low wear. Low contamination.

Soooooooooo .... Elkins45, what did you learn from the UOA? I mean, what did you discover that will lead to actionable choice?


The reason for doing it was to learn two things:

1. Is it actually a good quality oil suitable for long-term use (the answer seems to be yes)
2. Does it hold up to a 5K change interval? (it seems like it could go to 6K comfortably)

Ding ding ding!... winner winner chicken dinner!šŸ˜‚

If this were me I'd say I just found the lube I'm gonna be using for the foreseeable future.

Last edited by Mad_Hatter; 10/01/19 09:23 AM.
Re: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: Elkins45] #5228102 10/02/19 05:53 AM
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dnewton3 Offline
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Originally Posted by Elkins45
Originally Posted by dnewton3
Great report! Very low wear. Low contamination.

Soooooooooo .... Elkins45, what did you learn from the UOA? I mean, what did you discover that will lead to actionable choice?


The reason for doing it was to learn two things:

1. Is it actually a good quality oil suitable for long-term use (the answer seems to be yes)
2. Does it hold up to a 5K change interval? (it seems like it could go to 6K comfortably)


Frankly, any lube in the right vis that has the API cert mark is going to be "suitable for long-term use". I have yet to see a UOA that indicates an API lube being inferior to such conditions. Could that lube in your lube go 6k miles? Yes. But that's a pittance. It appears that it could easily go 15k miles, and probably more. Your Fe wear rate is around 1ppm/1k miles; that's almost absurdly low! The other wear metals are non-issues as well. There's no contamination to speak of. Understandably, if you're under warranty, you're not likely to push this out far. OK, then. But there's no reason to be buying syns if you're just going to follow the OEM schedule.

Here's the bottom line; what the UOA is confirming ...
Either ditch the syn and follow the OEM interval with the least expensive conventional lube that is API licensed, and quit doing UOAs. (There is plenty of evidence to show that dino lubes can do just as well under such conditions).
Or extend the OCIs out to a reasonable condemnation point where the wear rates rise above "normal" wear trends, thereby getting value out of the syn and the UOAs.

Essentially you're doubling down on waste, because you're not only wasting perfectly good lube, but also wasting information you paid for.


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: NAPA 0w-20 UOA Mazda6 2.5L 5000 miles [Re: dnewton3] #5228204 10/02/19 08:51 AM
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Elkins45 Offline OP
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The manual specifies 0w-20. They don't make a conventional 0w-20. If I decide to run something else it won't be until after the power train warranty expires. I have no desire to give them an out if something fails before 60K.

The WIX analysis costs $10 from Rock Auto, and I don't plan to do another.

The NAPA synthetic was $2.99/quart. I can't go buy a 5 quart jug of most conventional oils at off-the-shelf prices for that unless it's a house brand like Traveler or Harvest King. There's really no cost penalty for using this oil over a dino oil.

I may be misunderstanding you, but extending intervals until I start to get abnormal wear defeats the purpose of having lube. Isn't the goal to change it BEFORE the wear levels rise above normal?

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