OVERKILL
$100 Site Donor 2021
Yes.
Amsoil EFO 0w40 Euro Oil
- Thread starter rdubMK7R
- Start date
OVERKILL
$100 Site Donor 2021
That in no way explains the theatre of adding up disparate metals, all of which would have error bars on the concentration value, and whose presence can be part of the virgin lube, from chemical chelation or just noise, and then try to use this to draw conclusions about performance. It's even worse when tried to use comparatively, because you are stacking the error bars, but this is not reflected in the final figure, we aren't given a range, it's presented as an absolute value.
I asked him about this a while back. He's always great at responding.
"We could correlate used oil analysis results with actual engine wear. We did both used oil analysis and measured engine wear on the same test engines, and increased measured wear resulted in higher wear metals in used oil analysis. We could change oils and measure the difference in wear either way accurately."
This doesn't apply though across passenger cars using different operating environments, no trend analysis and inconsistent test methods.
Another thing that we've discussed before is even if you saw a consistent 15ppm more of Fe when using brand A consistently over brand B, it's still noise level overall. And you don't know if one oil is maybe leaving more deposits behind vs giving up a few ppm of wear.
He's definitely using used oil analysis to his benefit but it has to be taken with a grain of salt.
I personally think most oils do a great job at wear control and I don't think most brands will change what the B10 rating is.
"We could correlate used oil analysis results with actual engine wear. We did both used oil analysis and measured engine wear on the same test engines, and increased measured wear resulted in higher wear metals in used oil analysis. We could change oils and measure the difference in wear either way accurately."
This doesn't apply though across passenger cars using different operating environments, no trend analysis and inconsistent test methods.
Another thing that we've discussed before is even if you saw a consistent 15ppm more of Fe when using brand A consistently over brand B, it's still noise level overall. And you don't know if one oil is maybe leaving more deposits behind vs giving up a few ppm of wear.
He's definitely using used oil analysis to his benefit but it has to be taken with a grain of salt.
I personally think most oils do a great job at wear control and I don't think most brands will change what the B10 rating is.
If I did multiple trending samples under similar conditions as possible and saw 30ppm more of Fe consistently, I'd say in that particular case there is more wear. The next question I'd have is what type of wear, and is it within normal parameter etc. So it makes it very challenging when used to compare oils which is why it's not recommended for that purpose.
I can correlate the increase in Fe/Al/Cu in my used oil analysis dataset to increased wear from increased dust ingestion (Si) from a filter that was not attached (around 100K miles) as well as increased wear metals when my timing chain tensioner took a dump and was was wearing into the timing chain cover (around 80K). Also 2 turbo swaps with slight increases. The issue for the most part w/r to the wear vs. used oil analysis bit on BITOG is that folks do one used oil analysis on an oil and another on another oil and try to draw conclusions from it w/r to which oil had less wear...often this is just a few ppm difference and not enough data to say much. LSJR is looking at lots of data (like Blackstone) and has his own dyno testing/measurements to draw those conclusions from.
Last edited:
Similar threads
