Maybe you can explain this Speed thing, so a CK-4 specked oil is only 4 lower speeds, at what speed do we need to go to a Euro Oil?
Diesel engines do not operate at the same engine speeds as gasoline engines. Your typical HD truck engine is spinning 1,500-2,500RPM, your typical Euro car engine can be spinning north of 7,000RPM when being flogged. This is where things like foaming (where the Rotella T5 bombed the test) are relevant.
The CK-4 spec is going to be more Shear Resistant than the Euro Spec,
Based on what? HDEO's shear, have you spent any time in the diesel oil section?
Valvoline Premium Blue Extreme 5W-40, started at 15.3cSt, ended up at 13.5cSt
Valvoline Premium Blue Extreme 5W-40, started at 15.3cSt, ended up at 11.4cSt (there is also Rotella and Delo there, at 12.3 and 11.9cSt respectively)
Viscosity retention (shear resistance) is one of the parameters for many of the Euro OE approvals.
Speaking specifically of HPL, the 5W-40 Euro oil is going to be no less shear resistant than their 5W-40 HDEO.
the tests you talk about mean nothing to me.
While gasoline engine tests on gasoline engine oil may mean nothing to you, how an oil performs in a BMW N52 engine test is certainly more relevant than how it is going to perform in a Cummins ISL, if the oil is being used in a BMW N52 engine.
The OP in this Thread is going with a CK-4 specked oil.
Adam can go with whatever he likes, you made a statement, I've asked you to qualify it, so far, you have not.
When my stash of oil is used up, I will be going to a CK-4 oil from HPL for my Vehicle. I already got there 10W-40 CK-4 oil for my Riding Mower, I am betting that it will be just as good or better than the Shell Rotella T4 10W-30 that I used 4 the 1st 50 hours.
What you choose to do with your equipment doesn't answer the question I've posed to you.
There is a Moderator on this board that is using a CK-4 specked oil from HPL, and his engine is not specked for this oil. He is not using a Euro specked oil from HPL or the PCMO Oil from HPL.
Yes, Wayne, who I consider a friend of mine, ran a CK-4 built specifically for him, in his Dodge Durango. Just like I'm running a full-SAPS Euro oil that was blended for me in my RAM 1500, both oils from HPL. Wayne prefers the CK-4 additive package and I'm sure has his reasons, I prefer a full-SAPS Euro additive package and I've shared my reasons with you here, in that the test protocols for the Euro approvals are more germane to the actual end use than for an HDEO.
Again, that doesn't make an HDEO a bad oil or a bad choice, but it does mean there is considerably more evidence, in the form of approvals (and their associated tests) for the Euro oil in terms of actual performance in a gasoline engine application.