Blackstone implies JG DT40 is a waste of $
07-26-2017, 08:41 PM
#16
Drifting
Thread Starter
[QUOTE=Debo18D;14351728]Wow, I did NOT get that from the very interesting article. That statement is kind of a stretch.
You missed the Rennlist Click Bait disclosure
ditto "implied"
TBN & TAN - go to Bitog or
http://www.truckinginfo.com/blog/lub...hese-mean.aspx
T
You missed the Rennlist Click Bait disclosure
ditto "implied"
TBN & TAN - go to Bitog or
http://www.truckinginfo.com/blog/lub...hese-mean.aspx
T
07-28-2017, 12:10 PM
#18
Former Vendor
Lake Speed sent this to me, after he and I discussed the article from Blackstone. I am posting it here verbatim, which his permission.
Beyond what Lake states here, what we also do not know is what oil these engines were previously using before being switched to the evaluated oils. We do not know if a flush oil was used to prevent cross- pollination, and we do not know the service intervals or applications for each car that was evaluated. Neither does Blackstone, conclusively. We also agree with Lake concerning wear metals, the article didn't compare TAN, TBN, viscosity, or many other critical pieces of UOA that we always consider even more than UOA when judging an oil.
I see two issues with this article. First, it only focuses on the iron wear metal levels. The analysis is very different when you include all of the wear metals.
Porsche Flat 6 Subaru Flat 4 Porsche Flat 6
Oil DT40 Blackstone Universal Avg Motul
Miles 4600 3900 3200
Iron 6 9 6
Lead 2
Copper 2 8 2
Tin 1
Aluminum 1 4 2
Iron/1,000 1.30 2.31 1.88
Total Wear / 1,000 1.96 5.38 3.13
These are statistically significant differences when all of the wear metals are taken into account, so my first fault with Blackstone’s article is faulty data analysis.
Second, there is a section bias in the sample data. Here is what I mean. All of the engines selected for analysis are stock engines, so the results of “stock” oils for “stock” engines would not be expected to be radically different. The real problem is taking this “stock on stock” analysis and projecting it on all of the non-stock engines on the planet. Many of the readers likely have some aftermarket parts in their engine, so they are now removed from this data pool. As a result, this data does not apply to their situation. Heck, we’ve all seen enough of these reports to know this simplistic interpretation is not helpful nor accurate.
Thanks,
Lake Speed, Jr
STLE Certified Lubrication Specialist
STLE Oil Monitoring Analyst
Driven Racing Oil - Born From Joe Gibbs Racing. Driven To Win
13201 Reese Blvd, Ste 300
Huntersville, NC 28078
704-239-4401
Beyond what Lake states here, what we also do not know is what oil these engines were previously using before being switched to the evaluated oils. We do not know if a flush oil was used to prevent cross- pollination, and we do not know the service intervals or applications for each car that was evaluated. Neither does Blackstone, conclusively. We also agree with Lake concerning wear metals, the article didn't compare TAN, TBN, viscosity, or many other critical pieces of UOA that we always consider even more than UOA when judging an oil.
I see two issues with this article. First, it only focuses on the iron wear metal levels. The analysis is very different when you include all of the wear metals.
Porsche Flat 6 Subaru Flat 4 Porsche Flat 6
Oil DT40 Blackstone Universal Avg Motul
Miles 4600 3900 3200
Iron 6 9 6
Lead 2
Copper 2 8 2
Tin 1
Aluminum 1 4 2
Iron/1,000 1.30 2.31 1.88
Total Wear / 1,000 1.96 5.38 3.13
These are statistically significant differences when all of the wear metals are taken into account, so my first fault with Blackstone’s article is faulty data analysis.
Second, there is a section bias in the sample data. Here is what I mean. All of the engines selected for analysis are stock engines, so the results of “stock” oils for “stock” engines would not be expected to be radically different. The real problem is taking this “stock on stock” analysis and projecting it on all of the non-stock engines on the planet. Many of the readers likely have some aftermarket parts in their engine, so they are now removed from this data pool. As a result, this data does not apply to their situation. Heck, we’ve all seen enough of these reports to know this simplistic interpretation is not helpful nor accurate.
Thanks,
Lake Speed, Jr
STLE Certified Lubrication Specialist
STLE Oil Monitoring Analyst
Driven Racing Oil - Born From Joe Gibbs Racing. Driven To Win
13201 Reese Blvd, Ste 300
Huntersville, NC 28078
704-239-4401
