Brief discussion on lubricant compatibility, the test method, and the limitations of the test.
Can find the ASTM standard referred to here just blow it up full size, and it's readable.
Note the turbine oil standard goes much, much farther than D6922, and some of the things that are tested for...e.g. some mixes potentially have a greater viscosity than the thickest component, or a thinner viscosity than the thinnest.
Compare the requirement with D6922 which mix, cool, heat, cool, thaw, and have a look see at what happens, and one can see from Chevron's commentary that there CAN be things that aren't pretty when making blends
Can find the ASTM standard referred to here just blow it up full size, and it's readable.
Note the turbine oil standard goes much, much farther than D6922, and some of the things that are tested for...e.g. some mixes potentially have a greater viscosity than the thickest component, or a thinner viscosity than the thinnest.
Compare the requirement with D6922 which mix, cool, heat, cool, thaw, and have a look see at what happens, and one can see from Chevron's commentary that there CAN be things that aren't pretty when making blends