I was not recommending Grease but mentioned Grease as I believe I read that some of the other Members have used Grease.
I have only had experience with 1 CV Joint on a 86 Chevy Cavalier with a ripped Boot. It had Grease in it when I cleaned it out and I re-packed it with Grease when I installed the split Boot and that was over 6 years ago.
All CV Joints that use Grease must fling the Grease yet they seem to work fine;with Grease engineered for the job.

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84 300D, 82 Volvo 244Gl Diesel