Originally Posted By: labman
Ah, I expect PAO and all the dinos to be low solvency and close to the same.
It is true that ester solvency is typically way higher than PAO and all the conventional oils. However, the differences among the latter are still enough to have caused somewhat of a varnish epidemic in the hydraulic fluid and gas turbine industry due to oils being "upgraded" by using higher Group # dino base oils. Even if less degradation products are created by the higher Group # dino base oils, their solvency for their own waste can be disproportionately less, resulting in more deposits.
Ah, I expect PAO and all the dinos to be low solvency and close to the same.
It is true that ester solvency is typically way higher than PAO and all the conventional oils. However, the differences among the latter are still enough to have caused somewhat of a varnish epidemic in the hydraulic fluid and gas turbine industry due to oils being "upgraded" by using higher Group # dino base oils. Even if less degradation products are created by the higher Group # dino base oils, their solvency for their own waste can be disproportionately less, resulting in more deposits.