Mobil 1 5W30, 5,450 mi, 2007 Acura RDX

[pntballfreak]

Analysis done by Oil Analyzers.

This is the 1st UOA on the vehicle. Wife does her commute with the car, with occasional driving/romp on the gas by myself...

Her commute is about 30 miles a day roundtrip in light/medium traffic. I wasn't concerned about having a UOA done, until I noticed that the "Maintenance Minder" on the car suggested having an oil change done at around 3,500 miles. According to the dealer, the maintenance minder on the vehicle uses the ECU to calculate oil life depending on engine operating conditions. I thought they were full of it, but the wifey thought otherwise. So, I figured a UOA would set things straight.

Code:
Oil Mobil 1 5W30

Miles in use 5450

Miles on vehicle 25500

Make up oil 0

Filter Acura filter



Iron 9

Chromium 0

Nickel 0

Aluminum 5

Copper 1

Lead 1

Tin 0

Cadmium 0

Silver 0

Vanadium 0

Silicon 7

Potassium 15

Titanium 0

Molybdenum 106

Antimony 0

Manganese 0

Lithium 0

Boron 48

Magnesium 14

Calcium 2534

Barium 0

Phosphorus 683

Zinc 788



Fuel 3.0%
Soot
Water
Viscosity @ 100C cSt 9.4

TBN 3.97

Oxidation 16

Nitration 25


Comments by Oil Analyzers:

FUEL DILUTION is at a MODERATE LEVEL; FUEL DILUTION possibly caused by excessive idling.

We do let the car idle for long periods of time when we have the baby in the car with the A/C on. Happens on occasion but I didn't think that it would affect the UOA that much. Other than that, I'm thinking I could go with a 7,500 mile OCI?

Any comments/suggestions would be appreciated.

 

[chubbs1]

Usually I just keep the baby in the car w/o the AC running, that will cut down the fuel dilution. Other than that looks excellent!


Disclaimer: (I have no children and it was just a joke).

 

[Artem]

^Lol @ Chubbs.

OP, if the MM is coming on after only 3,500 miles then its very possible that your particular driving conditions/style is rather hard on the oil.

I'm not sure what the MM is programed too under ideal conditions but i doubt its anything higher then 7,500. the MM in my 07 Civic EX under ideal, mostly highway operation comes on at 7k.

 

[addyguy]

Even with the fuel, the oil is in great shape - would do 7500 easy.

Nice run!

 

[tig1]

Once your warrenty is up 8-10K wouldn't be a problem with this oil.

 

[pntballfreak]

LOL @ chubbs. Hopefully noone thinks that I leave the baby alone in a running car with the A/C on. There's always someone in there with him.

Artem...I felt the MM on the RDX was a little too conservative. I think the UOA proves it. My wife just kept bugging about the light on the instrument cluster. Next time, I'll just reset the oil life indicator...

Thanks for the replies. I switched to GC for this change (had 5 quarts laying around), but will probably just go with PP next change and onward.

 

[CATERHAM]

Great M1 report, but them Honda's (sorry Acura's) are generally easy on oil.
As mentioned you can easily go longer, and certainly so with the heavy GC you're using up.

 

[FZ1]

6 months,or,the olm,whichever,comes first. It's a turbo motor.

 

[webfors]

Originally Posted By: FZ1
6 months,or,the olm,whichever,comes first. It's a turbo motor.


+1

With that much fuel I wouldn't extend. Oil is cheap, turbos are not.

 

[D189379]

So the maintenance minder came on after 3500 miles, and you ran it another 2000 miles until 5500 miles, and then did a UOA?

 

[Artem]

Originally Posted By: pntballfreak
LOL @ chubbs. Hopefully noone thinks that I leave the baby alone in a running car with the A/C on. There's always someone in there with him.

Artem...I felt the MM on the RDX was a little too conservative. I think the UOA proves it. My wife just kept bugging about the light on the instrument cluster. Next time, I'll just reset the oil life indicator...

Thanks for the replies. I switched to GC for this change (had 5 quarts laying around), but will probably just go with PP next change and onward.



I agree that it does seem a bit conservative but then again, this is Honda's first turbo engine in a while. (first turbo K series anyway) so maybe not as MUCH R&D has been done to determine a safe yet long enough OCI for the boosted engine.

As with any 1st model car (or anything for that matter) you're basically the tester.

 

[JOD]

The oil's sheared down 15% already, and with that much fuel in it it's only going to get worse. I wouldn't extend it any longer than you've done already.

While K24's are "easy on oil", adding a turbo into the mix changes things quite a bit, and simply looking at PPM wear numbers from a single pass UOA isn't going to tell the whole story of the engine's health.

 

[slalom44]

These three UOAs are the only three RDX UOAs I've seen. They look similar, and tell me that this is a decent engine and should last a long time.

Thanks for posting!

 

[slalom44]

That's a decent UOA. Your results weren't much different than mine with similar mileage:
https://bobistheoilguy.com/forums/threads/07-acura-rdx-turbo-5978-mi-m1-5w-30.104070/
I didn't have as much fuel dilution, but my wife's driving habits are likely a little different. I suspect that the turbo contributes to this, along with short trips and long idles. Our RDX gets some long trips on occastion.

Here is ChicagoPhil's RDX UOA with fewer miles:
https://bobistheoilguy.com/forums/threads/07-acura-rdx-turbo-m1-5w-30-2756mi-5-olm.147746/

These three UOAs are the only three RDX UOAs I've seen. They look similar, and tell me that this is a decent engine and should last a long time.

Thanks for posting!