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Old 12-24-2016, 09:39 PM   #1
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Default Blackstone Oil Analysis (piston/ring wear?)

Got this done a few weeks ago. I have not been driving the van much so the last oil change was almost a year before. I had the oil in a glass container for a bit before i mailed it in. During this sample i did some long distance drives from PA-TX and PA out to Colorado. I also had the air intake recall done and all of my glow plugs changed out. Other than waiting and sending in another sample is there anything i should look into in the meantime or check out?

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Old 12-25-2016, 02:07 AM   #2
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Scaremongering, how do they know where the metal is coming from by an oil test?
Keep driving and stop worrying, when it fails it fails.

People tend to overthink too much.
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Old 12-25-2016, 01:10 PM   #3
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Vinyl Addict. You mentioned that you had some work done on the air intake. Go over the intake system and make sure that it is assembled correctly with no areas that could be drawing unfiltered air in to the engine. Sometimes, pulling contaminates can cause a suspect sample. I'm not sure that you would be seeing increases in Aluminum and Chromium necessarily, but anything is possible.

Sample again at 7000 as they suggested.
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Old 12-25-2016, 01:41 PM   #4
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Aluminum usually comes from piston skirts and chrome is usually from piston rings. There are not many other places which produce large amounts which also have these materials.

As mentioned a common cause of piston and ring wear is abrasive material in the intake tract. Check the seal on your air filter and your intake plumbing. Even a small amount of contamination can noticeably raise the levels of wear metals.

Those levels don't look bad, Instead they only warrant minor concern. I would follow their advice and do an oil change a bit earlier in the cycle And have it checked for wear.

If you do it a lot of very cold starts or similar service that can also cause elevated levels as there is less lubrication on the cylinder walls during start up.

It is also possible that your oil has reached its end-of-life at10,000 miles. You may consider changing earlier and having a total base number analysis done the next time around. The TBN Will give you a good idea of how much life is left in the oil.
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Last edited by Midwestdrifter; 12-25-2016 at 02:08 PM.
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Old 12-25-2016, 02:10 PM   #5
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

i have used oil analysis on several high hour aircraft engines i have owned. one was so bad i was having it tested every 20 hours. the evolution of test results was interesting. they can tell what parts of the engine the metal bits are coming from by the alloys present. bearings, piston, rings ect. as one engine neared its end, they advised me NOT to fly this engine. upon disassembly it was very clear why. awesome service. i was able to squeeze every hour of service out of the engine before overhaul.
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Old 12-25-2016, 04:13 PM   #6
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

I agree ostensibly with the notes at the header of the test results .
BUT
Your oil is high in the viscosity range and very high on the particle size of "molybend 'em" which can clog filtration mediums.
Be wary of Nap /Wix combo and "some oils" as the paper medium is at it top limit for flow.
The genuine MB filter has better flow rates. I have tested them all with an independent UK company specializing in filter flow rates.

I would be inclined to change your oil brand and viscosity to a lower weight for cold starts. Equally I see these figures on short run cycles on average what is your journey trip time/length.
Out of interest are you using an additive?
Dennis

Last edited by lindenengineering; 12-26-2016 at 04:39 AM.
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Old 12-26-2016, 04:05 AM   #7
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Quote:
Originally Posted by Tooth Fairy View Post
Scaremongering, how do they know where the metal is coming from by an oil test?
Keep driving and stop worrying, when it fails it fails.

People tend to overthink too much.
Bah - totally disagree. Why wait for it to fail at an inconvenient time? Might be in the middle of a vacation, way out in the woods or in the middle of a job for a client. Pain to get it towed and then forced to get it fixed at a shop at expensive shop rates.

Much easier to plan for the repairs, and do it at the owner convenience.

Oil analysis is just one tool that can be used to indicate the state of health of an engine.
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Old 12-26-2016, 05:02 AM   #8
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

I remember reading in an older uoa thread that the om612/647 always reads high aluminium. Presumably due to the cams that run direct in the head. This uoa posted above they don't seem to have picked up the average data. Maybe the op didn't supply the engine code?

Last edited by owner; 12-26-2016 at 05:06 AM.
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Old 12-26-2016, 01:18 PM   #9
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Don't panic, but don't ignore it either.

Based upon my experience with industrial refrigeration and other heavy equipment oil analysis I learned to put more value on oil sample trends than on the synopsis report. A single stand alone sample generally has less value than historical data.

Unless there is a big spike in critical parameters there is nothing wrong with watchful waiting.

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Old 12-26-2016, 05:13 PM   #10
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Default Re: Blackstone Oil Analysis (piston/ring wear?)

Very interesting! Thank you for sharing! Hope you continue testing and sharing results with forum?
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