Post your UOA, (used oil analysis) here

[Black02Silverado]

Here is the latest UOA on my daughters 2023 Kia Sportage.  

Kia oil filter.

Kia air filter with 5k miles on it.

AMSOIL Signature Series 0w-20, 6qts 8oz.

 

Edited October 30, 2025 by Black02Silverado

[Grumpy Bear]

Raven at 35K...Final answer 

 

 

 I would not have know this detail if I had not also run a UAO on Pepper from the same batch (case). Note the change in TBN chemistry? Now look at the oxidation? In Pepper, which shows no fuels, that value is 62. At minimum a 30 point spread assuming no elevation from base in Peppers sample which is silly to believe. 

 

When this sample was first run the attending paperwork which is attached to the outside of the pouch went MIA during mailing so the sample was run anyway but the Protocol is to run it as a Diesel motor oil sample. This has an impact on how the fuels is reported. 

 

A gasoline motor whose 100 C viscosity has dropped less than 1 cSt from the SAE grade mid point is reported as a fuels 'Estimate' of <1% and not actually run. For a diesel motor that threshold for actually running the GC is still 1 cSt but the 'Estimate" report is <2% and thus the original sample was so labeled and why not flagged! 

 

Elevated iron and aluminum from the trend along with this 2% estimate had me asking questions and the first run at it got the response of explaining the protocol. The tech then went the next step and actually ran the GC which in deed and fact was higher than 2%....just...but higher. 

 

Interestingly enough the viscosity trending in accompaniment with my detailed fuel logs show the point the injectors took a hike. During the miles accumulated to generate test #6 or two samples after the fact. 

 

Doing a Red Line SI-1 injector service currently. I will request the GC be run on the next sample regardless of viscosity result. If the service works, fine, I leaned something. Several somethings. If not then the injectors get replaced. 

 

This is a MPFI motor, not GDI and this motor from my first tank has seen only Shell V Power Nitro + fuel which has a boatload of detergents in it all ready. 3X the levels of Top Tier Fuel. (So the adverts say). 

 

I'm still in conversations with OA and getting positive movement. @Black02Silverado supplied the contacts and took the initial lead. I'm very happy with Nick and the lab at this point and now more educated about the labs protocols.

 

I will set my own internal markers for viscosity reduction and improved fuel system maintenance. And tickled pink I chose to use the Mirage "Home Market' oil "weight' grade and not the North America 0W20 SAE SP, ILSAC GF-6A spec oil.

 

There is nothing in my Mitsubishi Manual that mentions anything about routine injector service, chemical or otherwise.   

 

 

Edited November 19, 2025 by Grumpy Bear

[customboss]

6 hours ago, Grumpy Bear said:

Raven at 35K...Final answer 

 

 

 I would not have know this detail if I had not also run a UAO on Pepper from the same batch (case). Note the change in TBN chemistry? Now look at the oxidation? In Pepper, which shows no fuels, that value is 62. At minimum a 30 point spread assuming no elevation from base in Peppers sample which is silly to believe. 

 

When this sample was first run the attending paperwork which is attached to the outside of the pouch went MIA during mailing so the sample was run anyway but the Protocol is to run it as a Diesel motor oil sample. This has an impact on how the fuels is reported. 

 

A gasoline motor whose 100 C viscosity has dropped less than 1 cSt from the SAE grade mid point is reported as a fuels 'Estimate' of <1% and not actually run. For a diesel motor that threshold for actually running the GC is still 1 cSt but the 'Estimate" report is <2% and thus the original sample was so labeled and why not flagged! 

 

Elevated iron and aluminum from the trend along with this 2% estimate had me asking questions and the first run at it got the response of explaining the protocol. The tech then went the next step and actually ran the GC which in deed and fact was higher than 2%....just...but higher. 

 

Interestingly enough the viscosity trending in accompaniment with my detailed fuel logs show the point the injectors took a hike. During the miles accumulated to generate test #6 or two samples after the fact. 

 

Doing a Red Line SI-1 injector service currently. I will request the GC be run on the next sample regardless of viscosity result. If the service works, fine, I leaned something. Several somethings. If not then the injectors get replaced. 

 

This is a MPFI motor, not GDI and this motor from my first tank has seen only Shell V Power Nitro + fuel which has a boatload of detergents in it all ready. 3X the levels of Top Tier Fuel. (So the adverts say). 

 

I'm still in conversations with OA and getting positive movement. @Black02Silverado supplied the contacts and took the initial lead. I'm very happy with Nick and the lab at this point and now more educated about the labs protocols.

 

I will set my own internal markers for viscosity reduction and improved fuel system maintenance. And tickled pink I chose to use the Mirage "Home Market' oil "weight' grade and not the North America 0W20 SAE SP, ILSAC GF-6A spec oil.

 

There is nothing in my Mitsubishi Manual that mentions anything about routine injector service, chemical or otherwise.   

 

 

How many times have you changed the air filter? Exactly when at what mileage? 
I have a hard time believing injectors are an issue at this mileage. 

[Grumpy Bear]

2 hours ago, customboss said:

How many times have you changed the air filter? Exactly when at what mileage? 
I have a hard time believing injectors are an issue at this mileage. 

 

1.) 16,450 miles first time (Hengst E1138L)

2.) 22,458 NAPA 200125

3.) 36,796 NAPA 200125

 

18,281 fresh plugs

 

[customboss]

What’s PCV look like? Can you replace it or at least check it? 

[customboss]

NOx is up significantly so you ain’t burning it out. 

[Grumpy Bear]

5 hours ago, customboss said:

What’s PCV look like? Can you replace it or at least check it? 

 

Yes. 

[customboss]

11 minutes ago, Grumpy Bear said:

 

Yes. 

If spring or whatever regulator it uses is weak change it. 

[Black02Silverado]

I thought you ran E85 in Pepper.

[Grumpy Bear]

4 hours ago, Black02Silverado said:

I thought you ran E85 in Pepper.

 

Spring, summer and fall I do. In the winters I run lower dose blends to help starting; reduce moisture and give me a chance to do a chemical injector service (Techron, Red Line SI-1, AMSOIL, Gumout treatment etc.) I just did the winter swap this week running out the tank in a trip down state. She doesn't see many winter miles with the salt and all. So yes, for all practical purposes Pepper is an E-85 motor. 

Edited November 20, 2025 by Grumpy Bear

[Grumpy Bear]

On 11/19/2025 at 3:07 PM, customboss said:

If spring or whatever regulator it uses is weak change it. 

 

Got around to this job today. And as I had one changed the air filter...again

 

The PCV is horizontally mounted and is a simple shuttle absent a spring. Clean as a whistle and free. Hit it with some starter fluid anyway, greased the "O" ring and reinstalled. Plastic body and shuttle. Plastic rocker box. No torque spec so hand snug. 36,991 miles.  

[customboss]

3 minutes ago, Grumpy Bear said:

 

Got around to this job today. And as I had one changed the air filter...again

 

The PCV is horizontally mounted and is a simple shuttle absent a spring. Clean as a whistle and free. Hit it with some starter fluid anyway, greased the "O" ring and reinstalled. Plastic body and shuttle. Plastic rocker box. No torque spec so hand snug. 36,991 miles.  

If there is nothing obvious and we know the lab rats are calibrating GC to gasoline not diesel fuel then.....

 

Its not air filter loading for sure .... changed as often as you have. 

 

Pull plugs look for less than stellar burn.  That should he easy to check. Check for corrosion at contacts. 

 

I suspect coil-over/s may have gone south partially on all. 

 

That's just odd to go < 1% fuel and perfect NOx readings then get 2% all the sudden and 13 Nitration probably didn't even kill its MPG because ECM is compensating. 

 

Hope you nail it, I love this engine. SIMPLE 

 

 

[Grumpy Bear]

22 minutes ago, customboss said:

If there is nothing obvious and we know the lab rats are calibrating GC to gasoline not diesel fuel then.....

 

Its not air filter loading for sure .... changed as often as you have. 

 

Pull plugs look for less than stellar burn.  That should he easy to check. Check for corrosion at contacts. 

 

I suspect coil-over/s may have gone south partially on all. 

 

That's just odd to go < 1% fuel and perfect NOx readings then get 2% all the sudden and 13 Nitration probably didn't even kill its MPG because ECM is compensating. 

 

Hope you nail it, I love this engine. SIMPLE 

 

 

 

Just spit balling here but as all previous samples were estimates and all <1%....

And this one was as well AFTER the paperwork was resubmitted I'd bet fuels has been above 1% for quite some time. 

Can't quite get the tech to see that for whatever reason. I didn't quit nagging so she eventually reran it. 

 

So initial was <2% (based on no paperwork and default Diesel Protocol), then revised to <1% (based on Gasoline Protocol and < 1cSt viscosity reduction) ...then actually run at 2.1% 

 

It was the first OCI at 5K miles (up from 3,500 - 3,750 miles) I check oil every gas fill and up to 4K nothing looked any different than usual. That last 1K miles got much darker. I know color isn't a final indicator but I use it like one would use white snot or bubbles or thin black inky/stinky to get a quite heads up on those other issues. Yes, Nox caught my attention. Broke trend. 

 

One thing that does not work in this motors favor is the fact it is so efficient that it is hard to keep hot unless you are doing long highway runs. The thermostat is fine. Just it's nature to be cold blooded. Like a Honda Civic HX. You could burn a tank of gas in the DY5 motors and never get the thermostat to open. Start driving and on the money. Another very efficient motor. Little waste heat.  

 

 

[customboss]

1 hour ago, Grumpy Bear said:

 

Just spit balling here but as all previous samples were estimates and all <1%....

And this one was as well AFTER the paperwork was resubmitted I'd bet fuels has been above 1% for quite some time. 

Can't quite get the tech to see that for whatever reason. I didn't quit nagging so she eventually reran it. 

 

So initial was <2% (based on no paperwork and default Diesel Protocol), then revised to <1% (based on Gasoline Protocol and < 1cSt viscosity reduction) ...then actually run at 2.1% 

 

It was the first OCI at 5K miles (up from 3,500 - 3,750 miles) I check oil every gas fill and up to 4K nothing looked any different than usual. That last 1K miles got much darker. I know color isn't a final indicator but I use it like one would use white snot or bubbles or thin black inky/stinky to get a quite heads up on those other issues. Yes, Nox caught my attention. Broke trend. 

 

One thing that does not work in this motors favor is the fact it is so efficient that it is hard to keep hot unless you are doing long highway runs. The thermostat is fine. Just it's nature to be cold blooded. Like a Honda Civic HX. You could burn a tank of gas in the DY5 motors and never get the thermostat to open. Start driving and on the money. Another very efficient motor. Little waste heat.  

 

 

Great input. Do you think the cold snap you got recently hammered the test trends? 
 

Using slightly more viscous lubes will

hold some heat in. 
 

Im gonna be testing a new additive formula Valvoline is using in VR1 straight 30. 
 

 

[customboss]

2 hours ago, Grumpy Bear said:

 

Got around to this job today. And as I had one changed the air filter...again

 

The PCV is horizontally mounted and is a simple shuttle absent a spring. Clean as a whistle and free. Hit it with some starter fluid anyway, greased the "O" ring and reinstalled. Plastic body and shuttle. Plastic rocker box. No torque spec so hand snug. 36,991 miles.  

Hey Grump how dirty or moist - damp are the used air filters in your area?