Today, I degreased my diff and cleaned my CV boots very carefully and the "cans" . . . came out great! This car (1975 300D) had sat for several years with an engine knock so it has only been on the road for about 8,000 miles now with a new MB reman that I found. I noticed many months ago that the boots had been replaced at one time, definitely not the originals, and after cleaning and inspecting closely, (zero cracks!) I rubbed the boots with pure glycerin to condition after cleaning. The boots have german style clamps with screws so I can loosen easily and was thinking since I can do this, why not add a few cc's of gear oil via syringe once after lossening clamps. My question is, based on the above, how many cc's per joint and I assume any 90wt gear oil is fine? Thanks!