@The Critic,
@SubieRubyRoo and
@4WD I don't think we should derail this thread and turn it into a D1G2 vs D1G3 discussion because in the context of HPL it doesn't mean much, if anything. The reason why we buy HPL lubricants is because we want a better product with augmented properties. There already is ample evidence that HPL delivers.
If we'd make the same comparison within a budget product line produced by any of the large manufacturers, then sure, it would matter. D1G3, if anything, gave an opportunity to some of the big names to reformulate their product lines. Mobil 1 for example overhauled their entire product line when they made the switch to D1G3. Internally they probably saved some money, moved around some materials they used, but in the end, their products still perform well. Now, if you go to the lower tier lubricants, well, you'll get what you pay for. But as long as those lubes are API and Dexos licensed, you will get, at the very least, minimum spec performance.
However, in the context of HPL, it doesn't matter as they alway go to great lengths to augment the properties of the additive package they use along with using top tier materials. Simply put, for them price of materials is not a concern as they want to offer the best product they can possibly make. Consequently, D1G2 vs. D1G3 doesn't matter in this context.
That's just my two cents. Anyone who wants to continue debating this, be my guest.
I still have HPL Premium Plus PCMO lube blended with D1G2 and I'm going to use it with confidence. I also have a nice stash of Mobil 1 EP 0W-20, 5W-20, and 5W-30, all API SP Dexos D1G2 - this comes in handy in a pinch. And I also have plenty of Mobil 1 FS 0W-40 API SN (there is another discussion about this being reformulated to API SP), along with a few gallons of AMSOIL, Castrol, and Red Line that was blended with God knows what additive package. All of these lubricants are high quality and I'm going to use them up over time. There is zero reason for me to lose any sleep over D1G2 vs D1G3 or, in the case of M1 0W-40 - stress out when the API SP variant might become available.