Valvoline 0w-40 "European Vehicle"

Jackson_Slugger

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Not necessarily, Shell produces a Euro 0w-40 with no PAO or AN's. Is it easier to do with PAO, and AN's? Gotta be, otherwise Castrol would do it, as they don't appear to use PAO unless they have to.

Pour points of the GTL bases don't approach those of PAO, but you are right in that they are better than your average Group III. I'd have to bring them up, but I've posted the specs for them before.

All SOPUS oils, synthetic or blend, have very low pour points and they certainly DO approach those of PAO! Pennzoil Platinum HM 5W-20 is rated -51C as is Quaker State 5W-30. And since solubility of GTL is rather poor and rivaling that of PAO, they would almost certainly have to use some type of ester and Group I blended in, no?..

We really don't have Shell Ultra Helix 0W-40 here, but Pennzoil Ultra Platinum has a -51C pour point...
 

OVERKILL

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All SOPUS oils, synthetic or blend, have very low pour points and they certainly DO approach those of PAO! Pennzoil Platinum HM 5W-20 is rated -51C as is Quaker State 5W-30. And since solubility of GTL is rather poor and rivaling that of PAO, they would almost certainly have to use some type of ester and Group I blended in, no?..

We really don't have Shell Ultra Helix 0W-40 here, but Pennzoil Ultra Platinum has a -51C pour point...
GTL has poor solubility (like any other Group III) but lacks the issue of being hard on seals, so it doesn't need POE to balance it out. Ergo, the carrier oil can then be something less expensive, like Group II. I suppose they could also use a small amount of AN's, but GTL is less difficult to blend with than PAO and Shell doesn't make AN's, that's a Mobil thing, so they'd have to buy them.

We need to be careful not to confuse the pour point of the finished product, which is influenced by PPD's, with that of the base oils. You'll note I explicitly called out base oils.

Here are the common GTL base oil viscosities and their specs:
Screen Shot 2021-11-23 at 10.35.11 PM.jpg


As you can see these all have superior pour points when compared to your traditional Group III like Yubase:
Screen Shot 2022-02-27 at 12.40.07 PM.jpg


But don't come close to what we see with the same viscosities in PAO from Mobil:
Screen Shot 2022-02-27 at 12.44.26 PM.jpg

Screen Shot 2022-02-27 at 12.44.54 PM.jpg

Screen Shot 2022-02-27 at 12.44.35 PM.jpg


The nice thing about GTL is that it has less wax in it than your typical Group III, so likely requires less PPD's and those PPD's are more effective, which is what we see in terms of performance in the final products. With PAO, you can just avoid using PPD's altogether, but the final product's pour point is influenced by other aspects of the formulation, like the POE and AN's potentially used to help it out, and the additive package itself.
 
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