Thank you. That was very informative.The base stocks are different; QS grp III vs PZ GTL.
The common additives are different; more in the QS vs the PZ.
They both are certified to the same Dexos standard; two roads to the same destination.
The takeaway is that higher quality base stocks require less additives to achieve the same task.
Though not discussed, there are also additives which will not show up in ICP or other typical analysis methods.
None of this should be a surprise to anyone who's been on BITOG for more than a week.
It would be very helpful for all of us to understand the advantages of GTL based oils over regular Group III Full Synthetic oils.
From my limited knowledge, I 've heard GTL oils:
- Flow faster in extreme cold weather.
- Resist extreme heat better to prevent varnish/sludge.
- Have less evaporative loss.
- GTL oils are nearly as good as PAO Group IV oils, and that GTL oils don't shrink oil seals the way PAO based oils have been rumored to do.
Please correct any mis-statements' I've made above, and add more advantages / disadvantages for anything I've missed in the list above.