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#4673097 - 02/21/18 11:20 AM UOA - never did one - worthwhile to do one?
NissanMaxima Offline


Registered: 10/21/15
Posts: 187
Loc: co
Hi all:

I've never had a UOA done on any car I've owned and only heard about them when I joined BITOG. I have always maintained and treated my vehicles to the most stringent standards including Top Tier gas and changed oil regularly (and oftentimes probably prematurely). Therefore, is there any value for me to do an UOA on my two vehicles? One is my 1995 Maxima with about 70k miles the other is my 2015 Corolla with about 40k miles. Both bought new and 5w-30 Mobil1/Nissan filter used on Maxima and TGMO 0w-20 synthetic/Toyota filter used on Corolla. From what I understand on the articles on the site, a UOA isn't going to tell me the "condition" of the engine or perhaps the life left, but more so the condition of the used oil which is useful for OCI decisions (which really isn't a factor for me as the oil is changed before recommended mileage/time limits). Thanks so much.

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#4673109 - 02/21/18 11:29 AM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
Kira Offline


Registered: 08/19/10
Posts: 5250
Loc: Champlain/Hudson Valley
Pretty much my situation.

I believe you're on to the correct conclusion. Prematurely changed oil and filters of "today's" quality probably have done their job.
I'd bet an oil analysis would only tell you about metal wear endemic to a particular engine.

My plan is to change my oil today and do any topping off with the same oil. At 5,000 mi. (factory 7,500 mi. OCI) I'll have an analysis done.
I too do not know what it'll tell me.

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#4673186 - 02/21/18 12:24 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
khittner Offline


Registered: 07/13/12
Posts: 313
Loc: Michigan
Unless you're just curious about the various values, it's not worth doing. Your engines have loads of life (easily 150K+) left with your current maintenance regimen. UOAs aren't going to help you coax more life out of them.

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#4673193 - 02/21/18 12:32 PM Re: UOA - never did one - worthwhile to do one? [Re: khittner]
NissanMaxima Offline


Registered: 10/21/15
Posts: 187
Loc: co
Thanks folks. It would indeed be interesting to see the analysis but as I don't suspect any problems I've read about like coolant leaks, etc. AND I've been doing stringent maintenance, I think the expense is better put towards other necessities - like more Top Tier gasoline or an upcoming coolant change!

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#4673194 - 02/21/18 12:32 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
emmett442 Offline


Registered: 12/07/16
Posts: 177
Loc: Wisconsin
Same here.

I take care of my stuff. I don't even go overboard: I change fluids per the manufacturer, I pump gas at the most convenient station, I don't use additives or boutique products, and I fix my car if/when it breaks. I keep my cars a LONG time (most get recycled when I'm done - rust has done them in by that point) but I've never blown an engine, therefore I'm not convinced that I should do anything differently.

So, if I'm set in my ways and won't change my habits, UOA results aren't worth much!
_________________________
2011 Ford Crown Victoria LX 4.6L V8 auto
2009 Chevrolet Malibu LT 2.4L I4 auto
1974 Dodge D200 360 V8 4 speed manual

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#4673291 - 02/21/18 01:41 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
TTK Offline


Registered: 10/23/07
Posts: 566
Loc: TN
Never did one either. Don't plan on doing one either.
_________________________
2010 Volvo V70-3.2
Current Fill:Castrol Magnatec 5w-30
2018 Subaru Forester, 0w-20 Subaru oil
2001 Chevrolet Prism:Castrol Magnatec 5w-30


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#4673305 - 02/21/18 01:48 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
Nitronoise Offline


Registered: 03/24/10
Posts: 488
Loc: Chicago Suburbs
UOA is a tool I use 1X per year just to see what is going on inside my fleets engines as they are scattered out through the Midwest and away at school where i quiz my kids on maint.

I has saved my bacon a few times finding leaking intakes and sucking antifreeze into the oil on my GM 3.1 and 3.8 motors and it was a good tool to help detect a cracked head-gasket in my sons old jeep for your cars its around 50 or 60 bucks for 2 samples and you will sleep better at nite , at least I do
_________________________
07 Ford Freestyle 135K
04 Hyundai Sonata 280K
03 Hyundai Santa Fe 165K
02 Ford Tarus 98K
00 Buick Regal SC 135K
95 Goldwing 28K


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#4673315 - 02/21/18 01:55 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2753
Loc: Wet side WA
UOA will tell you the life left in that oil not the engine. If you change the oil as required under your warranty you will never use up a good full synthetic. But the problem with a UOA is it will cost you just as much if not more than a DIY oil change.
_________________________
2004 Toyota Corolla 121758
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4673316 - 02/21/18 01:55 PM Re: UOA - never did one - worthwhile to do one? [Re: Nitronoise]
dernp Offline


Registered: 10/18/12
Posts: 519
Loc: SW Fla
Save your money. UOA sometimes get way over analyzed and some folks don't sleep when they see 1 ppm increase.
_________________________
2014 Honda Civic 1.8 28k TGMO 0w20
2016 Honda Civic 1.5T Mobil 1 0w20
2011 Tundra 5.7L 83k TGMO



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#4673365 - 02/21/18 02:41 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
JLTD Offline


Registered: 12/15/17
Posts: 677
Loc: US
Originally Posted By: NissanMaxima
Hi all:

I've never had a UOA done on any car... a UOA isn't going to tell me the "condition" of the engine or perhaps the life left, but more so the condition of the used oil which is useful for OCI decisions (which really isn't a factor for me as the oil is changed before recommended mileage/time limits). Thanks so much.


You sir, have answered your own question.
_________________________
His: 2015 4Runner SR5 1GR-FE 39k, Amsoil OE 5w20/Wix
Testing vs Amsoil OE 5w30...then longer OCI on SS

Hers: 2008 Jeep Liberty 135k, Amsoil SS 5w30/Amsoil, minimum 10k oci

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#4673367 - 02/21/18 02:42 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
PimTac Online   content


Registered: 03/04/17
Posts: 4313
Loc: Soviet State of Washington
My understanding of this is that the uoa is not meant as a snapshot of engine health but a tool to be used to discern trends.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4673518 - 02/21/18 04:35 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
Leo99 Offline


Registered: 03/30/14
Posts: 3052
Loc: NJ
I don't see any point to them unless you just dig on oil.

In my opinion, engines will last a long, long time with proper oil changes. It's the seals that wear out and leak that kills them. At least that's been my experiences.

I'm going to pull an ATF sample when/if my Rav4 hits 365k miles. Just wanted to get a data point at 100k miles past the last one. Blackstone put it in their newsletter and said to change it out. I haven't touched it and might was send them the sample to add to the body of knowledge.

How many people actually change what they're doing based on a UOA?
_________________________
Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles
2004 Rav4 359,000 miles
2015 Camry 59,000 miles

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#4673640 - 02/21/18 06:24 PM Re: UOA - never did one - worthwhile to do one? [Re: Leo99]
Toto Offline


Registered: 02/10/10
Posts: 374
Loc: Grand Rapids, Michigan
Nothing wrong with someone doing a UOA for fun & curiosity, there are many different hobbies a UOA can be one of them.
TOTO.


Edited by Toto (02/21/18 06:27 PM)
Edit Reason: Misspelled
_________________________
AMSOIL-OE 0W 20-XL 10W 30-SEVERE GEAR
NAPA GOLD

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#4673760 - 02/21/18 07:40 PM Re: UOA - never did one - worthwhile to do one? [Re: NissanMaxima]
fdcg27 Offline


Registered: 09/25/09
Posts: 15702
Loc: OH
To me at least, UOAs are all about entertainment.
The only one I've ever posted that surprised me was one from my old BMW, which showed much lower wear metals than I would have expected.
The rest were more confirmations of what I already knew.
Still, they're fun to do occasionally and can alert you to developing problems.
They're also less than twenty bucks if bought in some volume from Polaris, which may be a better lab than that which shall not be named.
_________________________
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
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