Originally Posted By: Danh
Originally Posted By: ARCOgraphite
Originally Posted By: BikeWhisperer
...
Even though it is from Shell like PP, it is a different base oil. I would give PP an nod above due to the group III being synthesized from natural gas which puts it on the top of all the group III oils in my book.
... According to the ASTMD5800 volatility test on PQIA, the QSUD shows BETTER performance ( though likely statistically equivalent ) to the PP and, reporting well below 9% which should be a good clue that the QSUD IS in fact using the GTL basestocks. I have not seen a group III mineral crude based product with this low level of volatility. As a further clue, THE CCS cold pump report numbers are similar also.
See my prev post in this threads for both PQIA reports for comparison.
Maybe, but the Shell PDS for QSUD 5w-30 still shows volatility of 12.3%, not the sub 9% PQIA result. The PQIA test occurred around the same time PYB and QSGB also showed very, very low Noack volatility in PQIA tests leading to speculation that Shell was temporarily using excess GTL stocks in other products.
Based on currently-available Shell documents, QSUD is not a GTL-based product and is therefore different than Pennzoil Platinum. So, while QSUD is undoubtedly a fine product, I wouldn't conclude it's quite at the Platinum level, which SOPUS pitches as a a superior and more expensive product.
I know there exist batch to batch differences in product - like vegetables and fruit, but at this ONE PQIA snapshot in time they were THE SAME.
Anyhow, I like current Valvoline 0w20s better. It keeps my TCT unstuck in the Subarus and provide good power and mileage in the Honda.
The Nissan is not liking the Supertech; IDK if its a viscosity issue or overall the package 0r a misformulation or the constant sub freezing temps or the garbage gasoline up here.