First UOA on V6 Accord, looks good, low visc?

[LouDawg]

Just posted my first UOA on the Accord. Overall, it looked really good. But Si was a little high though normal, they said, and viscosity was a little low, but they also said it was normal for Hondas.

Wondering if I should change the air filter now? I checked it last week and it looked fairly clean. Car has around 17K total miles on it now. Just changed to PP 5W-20.

Also curious: they said try 6K miles next time, which is only 400 miles more than I did this time. But the OLM was still somewhere between 30-40%. So according to Honda, it could've gone around 9K miles if I extrapolate. But Blackstone said try maybe 6K. Any thoughts on the discrepancy between Blackstone and the OLM?

All thoughts and feedback are appreciated. Thanks!

 

[mgm13]

I would expect that Blackstone is a lot more accurate in their prediction than a factory OLM.

Big Mike

 

[ThirdeYe]

I'd agree with Mike. I think that the silicon might have to do with the OEM air filters that Honda uses. I believe they're using the ones that are coated with that blue grease stuff. I could be wrong though, so don't quote me on that, my Integra's air filters are different and what i'm more familiar with. Just what i've heard around the forums

 

[The Critic]

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I would expect that Blackstone is a lot more accurate in their prediction than a factory OLM.

Big Mike

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I would expect the exact opposite.

Si is probably from gasket leaching/dirt. Look at ToyotaNSaturn's UOA. He recently opened up his engine to replace the valve cover, and look at the high Si in his engine.

 

[4esorselrahc]

LouDawg-my OLM is at 60% with nearly 4000 miles on the current oil. That calculates out to roughly 9000 miles as well. I would definitely follow Blackstone's advice here. I'm going to go ahead and change the oil pretty soon-maybe this weekend as I'm running dino.

 

[427Z06]

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I would expect that Blackstone is a lot more accurate in their prediction than a factory OLM.

Big Mike

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I would expect the exact opposite.

Si is probably from gasket leaching/dirt. Look at ToyotaNSaturn's UOA. He recently opened up his engine to replace the valve cover, and look at the high Si in his engine.

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I agree with The Critic here. Also, I take Blackstone's comments with a grain of salt. I believe I can read a UOA as well or better than they can. If you want a real professional UOA interpretation...something you can really bank on, employ Terry.

 

[06VtecV6]

Lou Dawg,

I like your UOA of the 2nd MC fill. All your numbers were within spec and you were eazy on your car with a lot of freeway miles so you didn't real push the oil. It says they found shearing so you think the PP is helping in that regard? I think I am too hard on my engine to use MC again based on your UOA about the shearing and the Ld that was found. I wonder what my UOA would be on this current MC OCI. Yours is pretty good however I have to say that I do a lot more city driving, in total, they you do and I definitely am not soft on my cat. I expect it to perform aggresively atleast 15-20% of the time I'm driving. So just wanted to tell you that I feel like my choice of oil was validated a bit with your OCI. At the very least, I know this oil won't hurt my engine but based on your UOA, it looks like it's actually good for my engine. What do you think?

What kind of filter did you use again? I wonder how different the UOAs would be with stock Honda filter like I use.

Very interesting development with you but trying to extrapolate to what mine wil do is a 60-75% certainty or slightly greater.

 

[LouDawg]

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LouDawg-my OLM is at 60% with nearly 4000 miles on the current oil. That calculates out to roughly 9000 miles as well. I would definitely follow Blackstone's advice here. I'm going to go ahead and change the oil pretty soon-maybe this weekend as I'm running dino.

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My first change was the FF at about 5700 miles, the OLM still showed 30% (which actually means somewhere between 20-30%. The second and third changes still showed 40%, which also means that it was somewhere 30-40%. In all cases, the oils was in the mid 5K miles. So in all cases, it would have been 8-9K miles. I didn't feel comfortable going quite that far.

 

[LouDawg]

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Lou Dawg,

I like your UOA of the 2nd MC fill. All your numbers were within spec and you were eazy on your car with a lot of freeway miles so you didn't real push the oil. It says they found shearing so you think the PP is helping in that regard? I think I am too hard on my engine to use MC again based on your UOA about the shearing and the Ld that was found. I wonder what my UOA would be on this current MC OCI. Yours is pretty good however I have to say that I do a lot more city driving, in total, they you do and I definitely am not soft on my cat. I expect it to perform aggresively atleast 15-20% of the time I'm driving. So just wanted to tell you that I feel like my choice of oil was validated a bit with your OCI. At the very least, I know this oil won't hurt my engine but based on your UOA, it looks like it's actually good for my engine. What do you think?

What kind of filter did you use again? I wonder how different the UOAs would be with stock Honda filter like I use.

Very interesting development with you but trying to extrapolate to what mine wil do is a 60-75% certainty or slightly greater.

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I think the MC would be fine for you with any reasonable OCI. I wouldn't really worry about shearing if you stay within the OLM or less mileage. I don't think the shearing was unreasonable in mine, but I'll know more when I do the first PP UOA.

I used Purolator Pure One filters.

 

[LouDawg]

Critic and 427, not sure about the silicon being from the gasket...it was such a minor amount over. But I guess it's possible. I'll see on the next UOA. BTW, I plan to go with Terry on the next one to see what he thinks.

 

[06VtecV6]

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Critic and 427, not sure about the silicon being from the gasket...it was such a minor amount over. But I guess it's possible. I'll see on the next UOA. BTW, I plan to go with Terry on the next one to see what he thinks.

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FYI: I replaced my OEM air filter with another OEM at around 16k when I realized the dirt was so stained that no amount of blowing would fix it. So you're right about in that area 16-17 where you might find your air filter unservicable.

I don't know if you heard but I got a bolt on the air filter housing. What gasket are you referring to and do you think we should re-tighten the clamps and whaere are these hoses I should be checking? Now that Si has me concerned and remember, I lost one of the screws on the air filter housing for a few days this week. I just got a bolt fit on today temporarily until I can get the real OEM screw.

 

[427Z06]

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Critic and 427, not sure about the silicon being from the gasket...it was such a minor amount over.

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What I was referring is the numerous gaskets throughout the engine. Some are formed with nothing more than RTV Silicone Sealant(Gasket Maker). These can leach Si into the oil for a few OCIs on a new engine, or an older one if dismantled for repairs and RTV Silicone Sealant is used during reassembly. ToyotaNSaturn's UOA is the most extreme case I've yet seen, not all of them are that high.

 

[Merkava_4]

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All thoughts and feedback are appreciated. Thanks!

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I would go 5000 miles on Maxlife or Motorcraft 5w30, and I'd use a Fram Airhog filter. I know you may not appreciate this feedback, but you got it anyway.