Look at those specs for the 0w30 EOT amsoil... 0W-30 EOT- BMW LL 01FE, 3 MB specs, Porsche 30 and the audi one. I have been saying that for a while so many of those high reeving well built German cars using 0w30 and those specs prove it is no slouch for an oil. Redline 0w30 at 10.8, my guess between these two I'm thinking amsoil has the vote. Mind you this isn't SS which is the opposite, just as weak as redline in 0w30. And hats off to amsoil, redline doesn't make euro 0w30.
The Amsoil Euro oils caught my eye several months ago when I was looking for an alternative oil weight for my Lexus that specs a 0W-20 oil. It uses the T24A-FTS engine that is found in a few Toyota/Lexus vehicles. It is a dual injection turbocharged engine with a timing chain which I feel would benefit from an oil with a higher HTHS rating than what is found in 0W-20 oils, especially when driven hard like I do.
From my research I feel that the Euro oils across the board are very stout and not only formulated for good engine protection, but extended drain intervals as well. Personally I have no desire to push OCI's past about 5,000 miles in any of my vehicles with any oil but I do like the protection aspect, of course. I am no expert by any means and this is JMHO.
I have been using SS 0W-40 in my Ram for many years (about 30,000 miles) after initially using PUP 0W-40. Currently at about 61,000 miles. While I do not have a tick at idle (hot or cold), I have recently noticed what I think is lifter clatter upon startup, especially after going several days or longer without being driven. The clatter only lasts for about 2 seconds and is then gone. It is possible that this is nothing new, but I did not drive the truck much over the last year so whenever I did start it, it was after a period of sitting unused, so the clatter was more pronounced. Just sitting overnight this clatter is barely noticeable, if at all. I have gotten into the habit of reeving the rpm's up to around 1,200-1,500 for a second or two just prior to shutting the engine off and this seems to help immensely.
But this clatter got me re-evaluating my oil choice for the Ram at the same time I was searching for a good oil choice for my Lexus. I have always been a bit leery of using a 0W-40 oil as it just seems to me that this much viscosity swing is asking a lot of an oil and as the vii's shear, how long does the oil truly stay at a 40 grade. Since my Ram was approaching 1 year on its oil, I just changed it at only 3,500 miles and sent off a sample to Blackstone for analysis. I will post the results in the Blackstone thread once I get them.
Based on this uoa, it is possible that I will give another oil a try. While I am not married to Amsoil, I do like their products and have used them off and on for decades. I use their gear oil in all of my vehicles but the Ram is the only vehicle that I use their engine oil in. For me it is readily available and with the PC discount, I feel that the price is reasonable for a quality product. If I do give another oil a shot, it will probably one of Amsoil's Euro oils, either the 0W-40 (EFO), or the 5W-40 (AFL). Mobil 0W-40 and Valvoline Euro 0W-40 may also be worth a try.
These are my choices IF I stay with a XW-40 oil; otherwise a robust XW-30 is certainly worth considering and I agree that on paper the Amsoil 0W-30 (EOT) looks real good. While irrelevant for a Hemi, with the SP grade and MB 229.52 approval for LSPI mitigation it would probably be a good fit for the Lexus and I am curious how the 6.4 would do on it. I may give it a shot but it won't be any time soon since the 6.4 has fresh oil. Definitely something to think about though.