I'm wondering if grease has a similar issue. But the thing is. Grease doesn't have so many additives.
I repacked some wheel bearings last night. That hadn't been serviced since new in 1964. I've owned that convertible since 1967. The grease looked good. Recently did the rear wheel bearings in the GMC. Last did them on Dec 5 of 2015. And some of the lighter oils had separated out. And went to the center area between the bearings. I do make sure that the wheel bearing revivors on each side. Are properly filled.
Bob Dunahugh
I repacked some wheel bearings last night. That hadn't been serviced since new in 1964. I've owned that convertible since 1967. The grease looked good. Recently did the rear wheel bearings in the GMC. Last did them on Dec 5 of 2015. And some of the lighter oils had separated out. And went to the center area between the bearings. I do make sure that the wheel bearing revivors on each side. Are properly filled.
Bob Dunahugh