Quote from: ajpturbo on April 16, 2015, 12:23:31 PM
Amsoil signature series
Redline
Some but not all royal purple
These are the only true synthetics that use group IV/V base stock oils
All the over the counter stuff such as castrol syntec Mobil 1 and others are NOT true synthetics and use refined petroleum...meaning fake synthetic lol group III oil
I guess I fail to understand why this matters.
AFAIK, it's only speculative that Amsoil uses a pure PAO basestock. And even so, what means do they have to use pure synthesized lubes? They don't have assets. So, what do they do? Either contract the refinement or synthesis of their base oils to a big oil refinery. Or, just purchase it in bulk. And then treat it with their proprietary additive packages. Perhaps their base is heavily Group IV, but I highly doubt it is pure. It definitely has some II or III in it.
It's just like the petrol market - there is literally an open market, trade and exchange for blendstock fuels. That means the Shell fuel refined at Motiva Port Arthur gets traded or sold to Exxon, and vise verse.
Well, it's the same for lubes. Basestocks are traded, sold and exchanged. It's the proprietary additive packages treated later which brands an oil, and makes it perform.
Don't base your oil choices on the proclaimed grouping of basestock. Base it on performance.
Try Pennzoil Platinum Pure Plus. It is their fairly new GTL basestock. They are quote proud of it. And it seems to perform quite well.