Yes, the first batch of oils (Pennzoil Ultra, before the brand broke them into two camps) had excellent and extremely low Noack. That changed when the PUP and PP split happened, not sure why?
Well that's disappointing. Is GTL even any better than standard issue Group III?
Yes. It has lower Noack and better cold temperature performance, it just isn't quite as good as PAO. On the flip-side, GTL doesn't have the seal shrink issue that PAO introduces, that needs to be countered with esters, so it's not only cheaper to procure, it's cheaper to formulate with.
But didn't EP just very recently reduce its PAO content? So now who knows, maybe the Pennzoil base stock is better.
Oil is far more than the base stock(s). What you must consider is the full formula and how it works for the oil's intended purpose. You are oversimplifying a complex subject and product by focusing on the base stock(s), although I fully understand your (and my) interest in which stocks are used.
Yes poa reduced but there will group 3.4,5 oil will mix better the additive package need able last up to 20000 miles . For example in Walmart pennzoil platinum $24.xx and mobil 1 ep $26.xx so 2 dollars difference you get better additive package and base oil ( yes mobil 1 ep reduce poa % msds because mobil can used any base oil with various % as long it meets then standard which can be used 20K . Pennzoil Gas to liquid which in between group 3 and group 4 (poa)
I literally *only* mentioned base stock. I am not oversimplying how important the full formula is because I didn't even *mention* full formulas.
EP reduced PAO and increased GTL, which is a cheapening of the product, yes, but no, it still has more PAO than the Pennzoil product (which has none). Mobil has been doing GTL + PAO (+AN's and Esters) for a while now, EP is just the latest casualty. This type of blend of base oils can reduce production costs while keeping performance close to the same.
Not that I've ever seen. It doesn't need it to counteract the seal shrink of PAO (because it doesn't have any) so the only benefit would be cleaning. Do we see higher levels of oxidation in VOA's? That's usually a tell.
I have read old msds 1-5% POE . Maybe they put some .
Are you sure that was POE? Esters typically aren't called out on an SDS, since they are non-hazardous (that's why we never see them). However, ZDDP often IS called out, and it's an ester.
It's not necessary with GTL, you can just use a lower group base to provide the carrier and solubility function. That of course doesn't mean they don't, but it wouldn't be called out on an SDS because, as I noted, ester base oils are non-hazardous, same with AN's, which is why we don't see either on the Mobil SDS's.
Nope, I've only ever used the SRT oil briefly and that was on my previous 2016 Grand Cherokee SRT, this one has only had Ravenol and HPL
