427, the molecular structure of most POE and other ester lubes have a better affinity for metal and will remain lubricious by their ability to "STICK" ( like Handle
) to the lubricated component.
Thus a PAO base could be more negatively influenced and the protected component more severely worn by the fuel dilute impact.
Both bases resist hydrodynamic influences of chemical and physical shear about the same, keeping a good ring seal that resists the corresponding "snowball" ( like stick and handle)
effect of fuel dilute in a piston engine.
So yes from our testing we see heavier levels of POE and Esters resist increased wear when compared to a primarily PAO syn lube.