bat711

I had an oil analysis done a while ago by Blackstone Labs. Just sharing the data. I'll add more as they become available.

Note -- this oil was whatever the dealer added at the prior maintenance. As you can see it didn't maintain 10w-30 properties (if that was even what was used) over the 5,500 mile period. This oil change was done with 5% oil life indicated on my 2006 MY.

INDYMAC

From the other F22C1 UOA's that I've seen, this looks OK. I think Honda put some of their bulk 5W20 oil in there though. I don't know why Blackstone said 5W30. If you are concerned about oil viscosity used in your S2000, make sure to specify which you prefer to the service manager. Otherwise, I bet the quick lube tech will continue to fill with 5W20. Did they put the correct oil filter on?

SpitfireS

Thanks for posting the UOA
Ask your dealer what oil they DID put in, as INDYMAC mentioned it most likely was a 5W-20.
Your UOA shows that's OK, no need to change anything as long as your driving style doesn't change (suddenly going to track days every weekend, Autobahn kinda long high speed runs etc.)
If the dealer confirms it was a 5W-20, keep doing what you're doing, its working perfectly.
If they say it was a 10W-30 you may want to stop using it as that brand & type of oil shears down a lot and you're not getting what you pay for.

How was this sample taken?
There is a little fuel dilution

Ask Blackstone to do a TBN as well next time (will cost $) to see how much "Oil life" is left after 5500 miles.
Knowing wear metals, viscosity, fuel, water etc is IMO 1 of 2, knowing the TBN, Total Base Number, is handy to determine if the oil was still able to deal with acidic combustion by-products every internal combustion engine produces.
If the TBN gets below 2 or 3 (according to BITOG IIRC) it may be better to shorten the OCI a bit or use better oil.

And yes, ask if the dealer used the proper oil filter.
The S2000 uses a specific, non-Honda-generic oil filter.
Part # 15400-PCX-004, check the FAQ on top of UTH for oil filter threads.

bat711

That's what I took away from it as well. It was the correct filter when I changed it out myself, but definitely not the right viscosity oil. After I drained this stuff I switched it to Mobil1 synthetic 10w-30. Not sure if dino oil always like this, but there seemed to be a significant amount of "sludge" accumulated on the drain bolt. Compared to this time when I drained out the Mobil1 syn. there was essentially nothing.


The oil was taken from an oil change. I had this sample sitting in a storage container for a bit (1-2 weeks) before I packaged it and sent it out for analysis. Not sure if this could cause any problems.

I'm going to have this done on the sample from my latest change. I switched over from whatever the dealer was using to Mobil1 synthetic 10w-30. I plan on using this for all future changes so I'm going to make sure it copes well with ~6000 mile intervals. I'll post up the results of that when I get them in a few weeks.

INDYMAC

Sounds like a great plan bat711. Posting a UOA of Mobil 1 10W30 would be of great value to the forum. It seems to be the most popular choice here and many people swear by it (or was that swear at it?). Anyways, you will be the first to post a UOA of M1 in the S2000 that I have seen. Thank you very much!

CoralDoc

That UOA looks pretty good. Compare with mine in the second link below.

First to post data on Mobil 1 Oil? Not by a long shot!

Scroll down for commentary on Mobil 1 oil.
More recent issues with elevated copper levels.

Silver_Slug

For comparison, here is my AP1 M1 Testing (sorry it's so small). This is Mobil 1 10x-30, Honda OEM air and oil filters.

Silver_Slug

Virgin M1 Test.

slalom44

I agree, this is a good UOA. Thanks for posting.

I'd be inclined to think they used a lower viscosity oil on your previous oil change since this engine isn't prone to shear oil, and your wear is low. They definitely did not use Mobil 1.

I agree with SpitfireS - testing for TBN tells a lot about how long you can go on the oil used.

CoralDoc

I disagree. I have seen lower viscosities than I would have expected on all of my UOAs from Blackstone and I use Mobil 1 10W/30 exclusively (since break in). The lowest value I have seen was 8.75cSt, slightly higher than the 8.16 cSt reported by bat711, however his oil change interval was longer than mine (5,500 vs 3,736) allowing a longer time for the oil to shear down. From four other oil changes, viscosities ranged from 9.0-9.4 cSt, and the expected values are above 9.9 cSt.