2009 Honda CRV. I'm not sure what oil I put in it but I do know that it was either Valvoline 5w-20 synthetic high mileage maxlife or NAPA 5w-20 synthetic high mileage. Napa Gold filter was used. I wasn't trying to do extended oci's with this vehicle so running the oil this long was accidental. This oil was in the sump for about 27 months. I normally try to keep the oil changes around 6-7k or once a year. No makeup oil was added and the oil level was in the lower portion of the safe zone on the stick. This vehicle get driven infrequently and might sit for 3 months without getting started and then be driven every day for a couple weeks. New oil is Valvoline 5w-20 synthetic high mileage maxlife with a Mobil 1 extended performance M1-110A filter
2009 Honda CRV 2.4L 13,021 oci 131,821 miles on unit
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Oxidation is up by less than 10 and so is nitration (Assuming my recall is correct). WhileTBN doesn't make it look like it has a lot of reserve left it appears it was still doing an excellent job.
Ask them to correct the miles on the unit to 131821 miles. That is some amazing data for low Fe for 13k and 27 months. I would ask the lab to run it again. It is usually free. The Fe ppm levels are too low to be believable. No make oil added?
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Okay, Mr. OCD
You could've easily pushed this OCI to 14k.
In all seriousness, if the wear metals are accurate, this has got to be a low wear record.
Combined wear metals: 13
Oil miles: 13021
Total metals per 1000 miles: 13/13.021 = 1.0
For reference, a typical "good" value is 3-5 and it's pretty common to see 5-10ppm per 1000 miles for total wear metals. I do agree with the comment about requesting a retest. These results are almost too good to be true. Either that, or the mileage is way off. 13ppm total wear metals is more typical of a 4000 mile oil change interval.
In all seriousness, if the wear metals are accurate, this has got to be a low wear record.
Combined wear metals: 13
Oil miles: 13021
Total metals per 1000 miles: 13/13.021 = 1.0
For reference, a typical "good" value is 3-5 and it's pretty common to see 5-10ppm per 1000 miles for total wear metals. I do agree with the comment about requesting a retest. These results are almost too good to be true. Either that, or the mileage is way off. 13ppm total wear metals is more typical of a 4000 mile oil change interval.
I will ask them to correct the unit miles and also a re-test. I didn't add any oil but it was going to need a quart added to the sump before I changed it. I was surprised at the results since being so far past the target oci. This is the first sample done with this car so I don't have a reference to look back at. The only reason I sent a sample in was because of the miles.
I'm going to try and stay with the 6-7k oci. The only gas engine reference I have is from the gf's Camry and that had combined wear metals of 12 at 8,000 miles with 104,000 on the unit. I'll try to post that later.
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My Toyota V6 2GR-FE produces between 1.0 to 1.5 ppm of Fe per 1K miles for the last 121k miles since day one. I have used three different labs: Blackstone, Fabick CAT and Horizon (Polaris) over the last 10 years. Asked the lab to re-calibrate before re-taking the UOA again since they will hold ur sample for 30days. They usually have no problems on a re-do.
I don’t want to be sound harsh but u spent good money on the analysis and u are entitled to having confident repeatable results. U need to find the root cause of your results otherwise why even spend the money.
Here is an OCD link to my uoa.
UOA with wear metals
I agree and I am OCD about getting things right.
My Toyota V6 2GR-FE produces between 1.0 to 1.5 ppm of Fe per 1K miles for the last 121k miles since day one. I have used three different labs: Blackstone, Fabick CAT and Horizon (Polaris) over the last 10 years. Asked the lab to re-calibrate before re-taking the UOA again since they will hold ur sample for 30days. They usually have no problems on a re-do.
I don’t want to be sound harsh but u spent good money on the analysis and u are entitled to having confident repeatable results. U need to find the root cause of your results otherwise why even spend the money.
Here is an OCD link to my uoa.
UOA with wear metals
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If money is no object, I would send in a new UOA for this oil change (baseline 0 miles) and do another UOA at 5K. The baseline which has residual oil should have a diluted Fe ppm level less than 8ppm.
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Good idea but this oil has probably (without looking) 5-600 miles on it already. I have a pump so I can pull a sample at 5K and send it in. My main concern with this sample being ran longer than I prefer was to see if the TBN was low and also the wear metals. If the re-test comes back the same it looks like my only concern would be the fuel dilution being a little high.
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Awesome results. I’d personally use whatever syn at 10k with these results
Just pick with 1 or 2 years for your OCI. I’d just check your oil level at least once a year. 
Have you considered simply buying a roll of new tubing and pulling a sample at 12 mo and every 6 mo afterwards? You could tell when changes in oxidation/ nitration / tbn started to accelerate and it was time to change.
I've had sample valves for this on heavy equipment but the CR-V might not have a convenient location. I don't really trust drawing small samples from the bottom of the sump (Fumoto Drain Valve) as I've had some strange spikes doing that.
I've had sample valves for this on heavy equipment but the CR-V might not have a convenient location. I don't really trust drawing small samples from the bottom of the sump (Fumoto Drain Valve) as I've had some strange spikes doing that.
Nah. These pre-DI K24’s are just great engines.
Here’s my 11k mile UOA with 8ppm Fe. 1qt of makeup oil added, which is about 20% of the oil capacity.
https://bobistheoilguy.com/forums/t...-m1-0w-20-11k-mi-on-oil-258k-mi-total.373617/
Yes I'll be pulling a sample via the dipstick tube with a pump at around 5k. I'm really not interested in seeing how far I can go with the oci but it's good to know that everything was looking good at the 13k mark.
They retested it and the results were essentially the same. Aluminum went from 4 to 6 and the lead went from 0 to 1.
Very good, thanks for updating w/that information.