Originally Posted By: Virtus_Probi
Originally Posted By: dailydriver
Originally Posted By: JAG
Later, I’d probably extend OCI and use Amsoil Signature Series in viscosity grade meant for dexos 1 gen 2 applications.
Can someone PLEASE explain to me
HOW Amsoil has
12 TBN, low LSPI and D1G2 Sig Series oils?
Is it all 'smoke and mirrors', or do they overbase it with
crazy boron and magnesium levels to replace the calcium in order to accomplish this feat?
(Or is it their exceptionally low NOACKs doing the bulk of this accomplishment?)
Just want to point out that the Amsoil SS oils do not actually have d1G2 licenses, Amsoil claims that they pass the d1G2 LSPI and timing chain tests (and I certainly trust them on those points) but they also state that the SA levels are too high for d1G2.
I believe that the fine BITOG poster Molakule also shared with us some time ago that he used organic additives to raise the TBN of an LSPI-resistant oil he was working on (apologies to him if I am putting false words in his mouth).
You can also look at M1 5W30 for an oil that has a fairly high TBN (almost 10 per the PQIA) with low calcium levels as well as a fairly low SA level of 0.8%...been like that for years.
YES, I know all about their lack of
actual D1G2 certification, but yes, as you have also stated they DO
claim that these new formulations of Sig Series ARE in fact geared towards a reduction of LSPI events.
Even though the starting TBN is down a bit (@ 8.3), the 0.77 SA, 6.0 NOACK, Ravenol DXG is looking better and better all the time for MY purposes than anything else out there, AND it will only be
slightly costlier than the much revered on here, similar NOACK level, M1 5W-30 ESP which I have NEVER EVER seen sold for less than ~$9.25/quart, or in 5 gallon jugs anywhere, for ANY price (and yes, I DO realize that you are referring to old 'plain Jane', but D1G2 certified, M1 5W-30, and NOT their ESP
).