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  #1  
Old 05-21-2020, 02:59 PM
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bkervaski bkervaski is offline
 
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Default Blackstone findings .. looking for advice

Looking for advice!

Just had my latest oil report from Blackstone, my metals are trending like the image below.

Note that this last sample was actually from the filter, simply got distracted by hangar visitors and missed my chance to grab some from draining.

170 hours on the engine, not sure why that's not on there. Also, there could have been more oil usage since last check, it says 1.5 but it's probably more like 2-3, but certainly lower than previously.

They commented: "No one thing is terribly out of line, but this is certainly a departure from the way things were going, so it's worth watching. Any high temps? Oil use is down a bit, so maybe metals are just less diluted."

No high oil temps, things seem to be running quite normally.

Being fairly new at what numbers are normal and what to be concerned with I figured I'd get some advice from you good folks

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Old 05-21-2020, 03:12 PM
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DeeCee 57 DeeCee 57 is offline
 
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well, had a quick look at your numbers. Lead (and alu) is the only one that really increased... using any additives?
Rest looks ok to me, though, as usual (doing quite a few of those number crunching analysis right now...), the engine is not being flown enough. 50hrs/year is THE absolute minimum.

Guys, go out and fly, gas’s never been that cheap
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Old 05-21-2020, 03:57 PM
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Quote:
Originally Posted by DeeCee 57 View Post
well, had a quick look at your numbers. Lead (and alu) is the only one that really increased... using any additives?
Yep, Camguard.

Seems like I fly all the time, at least once usually twice per week. Problem is it's usually about an hour around the area. I'm heading into heavy IFR practice mode that should get the virtual hobbs turning.

Also, at what levels are these numbers considered a problem? I've been searching, not coming up with much.

Thanks for the advice!
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Last edited by bkervaski : 05-21-2020 at 04:04 PM.
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Old 05-21-2020, 04:36 PM
Kyle Boatright Kyle Boatright is online now
 
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Seems to me the filter would tend to concentrate any particulates, so if you got your sample from there, you might see higher concentrations of that stuff than if you took a plain 'ol oil sample.
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Old 05-21-2020, 04:40 PM
jim etcheverry jim etcheverry is offline
 
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I am in the oil business and use oil analysis to extend drain intervals all the time. The numbers for limits are in a range and change for the unit your are measuring ex. engine, gear box or trany. Example engine: Iron 100ppm, copper 40ppm and silicon (dirt) 20ppm. There are usually several areas on the report. 1. wear metals ex. iron ,alum, copper ,tin etc. In this case iron would be cylinders and copper would be bearings. 2. additive package ex. calcium, magn, phosphorus and zinc. This would change with different oil used. 3. contaminates
ex. silicon - dirt mainly.Blacksone and other just list them all in one column and it makes it seem like they are all wear metals, could be a little confusing to a first timer. Also lead is from 100 low lead (ya). With oil analysis you don't excite about one , your look for trends. Your looks good. You are still setting your trends. Blackstone is nice as they use their data base of your engine to compare to. Since the 390 is still relative new, compared to say the 360 your model numbers are of a smaller sample. Here is ex. what you would find if you had not flown for an extended period like 6 to 8 weeks.Elevated iron and you would not be worried because that is from the cylinders sitting perfectly normal. You will love your IFR rating.
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Old 05-21-2020, 04:54 PM
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Awesome info folks, thank you!
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Old 05-21-2020, 06:31 PM
BillL BillL is offline
 
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Default Delete this data point. Worthless.

Quote:
Originally Posted by bkervaski View Post
Awesome info folks, thank you!
Forget about this sample. The filter sample completely botched the results. (not a personal comment, just related to a representative sample) The oil must come from the drain stream after a few seconds to clear the stream.

Or it could come from a well maintained tap into the oil manifold.

You are lucky it looks this good, pitch these results!!!
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Last edited by BillL : 05-21-2020 at 07:16 PM.
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Old 05-21-2020, 07:46 PM
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Quote:
Originally Posted by BillL View Post
Forget about this sample. The filter sample completely botched the results. (not a personal comment, just related to a representative sample) The oil must come from the drain stream after a few seconds to clear the stream.

Or it could come from a well maintained tap into the oil manifold.

You are lucky it looks this good, pitch these results!!!
Bill beat me to it. Taking a sample from the filter is bound to give results that are out of wack with the rest of the samples.

Seeing your iron (Fe) up in the 30's makes me feel better. Mine ran around 12-16 ppm for 500 hrs, then crept up to a little over 30. Had me worried, but seems to have settled in there now. I'm still watching it closely.
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Old 05-21-2020, 08:00 PM
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My opinion, stop wasting money on something that does nothing but cause anxiety
You want to help your engine, change the oil more often.
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Old 05-21-2020, 08:34 PM
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Quote:
Originally Posted by Walt View Post
My opinion, stop wasting money on something that does nothing but cause anxiety
You want to help your engine, change the oil more often.
Exactly. I stopped this sampling 2 years ago. My wife loves me even more for it.

Start sampling if/when you have a reason to.
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