Blackstone Labs report at almost 90,000 miles

RCinNC

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I haven’t posted in quite a while, but I thought this might be interesting to some members here.

I’m approaching 100,000 miles on my 2014 S10, and thought it would be a good time to send an oil sample to Blackstone Labs and see if anything weird was going on inside the engine. For a historical perspective on the bike, I do a lot of two up loaded touring, but not a lot of interstate riding. The bike is ridden year round, in temperatures that have ranged from the 20’s (F) to the 100’s (F). It’s been ridden in 33 states, on all types of road conditions from pavement to sand. I do quite a bit of riding on gravel and dirt surfaces.

The bike gets regular maintenance (by me), and has had valve checks done by the shop at each specified interval. I don’t use any oil additives. The bike has never been in the shop for any major repairs. I did have the cam chain tensioner replaced with a newer model at 84,146 miles during the last valve check. In almost eight years of ownership, I’ve had several headlights burn out, I’ve had to replace the OEM battery once, I had to have the rear wheel re-trued once, and I had one fuse (the original 10 amp headlight fuse) burn out. That’s pretty much it.

I pulled a sample on 05/07/22 at 88,965 miles during a regular oil change. This is the Blackstone Labs report on that sample:



The oil had been changed 26 times on the bike up to the point the sample was taken. Out of those 26 oil changes, I skipped changing the oil filter four times. This is the breakdown of the oil and filters used on the bike during its lifetime:



The "unknown" entry is because I forgot to record the type of oil I used.

By far, I’ve used the Mobil M1 108 filter most often, because it’s a common brand stocked in places like O’Reilly’s. Using the other brands like Wix or Bosch has usually been because the Mobil wasn’t available. The Mahle makes an occasional appearance because they were on sale on Amazon.

There you have it. Approximately 67% of the miles on the engine have been accrued using standard automotive oil, and approximately 31% has been accrued using motorcycle specific oil. None of the oil has been synthetic; I only switched to synthetic oil at the most recent oil change (after the sample was taken) because the auto parts stores were out of Castrol Go 4T.

I found the Blackstone Labs report to be very encouraging. I don’t baby the bike; it’s basically my car, and gets ridden almost daily. It gets regular maintenance, but not of the obsessive compulsive variety. I found that I do change my oil at a greater interval than is recommended: on average, I change it every 3421 miles, rather than the recommended 4000.
 

hulkss

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Your oil viscosity is too low for proper engine protection (7.62 at 100 degrees C). In my opinion, it should be at least 10cSt (the report says should be 11.6-14.8).
The viscosity is also important for the transmission gears.

With improved viscosity, your numbers would be even better.
 

Don in Lodi

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Flash point lower than it should be and low viscosity, I wonder if you're getting some fuel in the oil? Ah, low fuel %. Higher magnesium, zinc and phosphorus, are those automotive oil additives?
 
Last edited:

Little Joe

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Agree on the low viscosity levels.
I did multiple black stone tests on my 14 FJR. 10/40 yamalube, 15/50 yamalube, T6 5/40(worst for shear even at 3000km). 20/50 yamalube
15/40 ROtella T .

If I lived in hot climate like Florida would use 20/50. (Based on test results)
15/40 RT tested better than all of the above holding it’s viscosity with time/miles. (20/50 as good but a little heavier for cold temp starts).

Transmission gears and especially bevel drive causes the shear degradation IMO.


Sent from my iPhone using Tapatalk Pro
 

RCinNC

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Little Joe, I appreciate the input. I've always stuck with the 10W-40 and 15W-40 because their upper temperature range was 110 F, and that's what Yamaha recommends. It does get really hot here in NC in the summer though, and the mid 90s aren't uncommon at all. I think for my next oil change I'll switch to 10W-50, which gives the broadest range for the approved oil weights for the S10 (-10 F to 120 F), and do another oil test after than and see what the viscosity looks like.

Or maybe I'll just go back the the Rotella 15W-40. I wasn't aware that it outperformed the other oils as far as maintaining viscosity. I used that for a long time, as you can see by the chart I included in my post, but I stopped using it when they stopped maintaining their certification for use in gasoline engines. I think that is mostly a concern for newer car engines with much tighter emission controls; if I recall correctly, the zinc level in the T4 supposedly isn't optimal for modern catalytic converters. Changing from the Rotella was probably overcaution on my part, and it still carries the JASO MA/MA2 certification.

For reasons not really explained in the report, Blackstone Labs didn't feel like the viscosity numbers in my sample were a concern. Perhaps that was because, in spite of the lower number, there was not a corresponding high number of levels of metal like chromium or molybdenum, which would indicate a higher than average level of engine wear for a bike with my mileage. Perhaps their opinion is that the oil must still be doing its job properly, since the engine itself isn't showing excessive wear. Maybe I'll follow up with them on that.
 

wera688

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Aug 29, 2016
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Newnan GA
My Blackstone sample on my 2014 with 205,064 miles had good numbers. I'll send in my 2016 at +118,000 miles for oil sample soon. The 3 things I wanted from my oil samples are: how is my oil viscosity holding up and what is my optimal mileage for change (I've settled on 8000-9000 mile intervals), is there any metals in my oil and is there any water/antifreeze/other accumulates in my oil. I sample usually every 50,000 miles. I'm looking for a general health overview and for any potential issues on the horizon.
 
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