There are at least five(3) ball type joints at each front wheel that have rubber boots that contain some type grease in them. If they ever tear or dry out grease leaks out. The stabilzer bar connecting links have boots that from the factory did not contain any grease, if I'm correct, but are still lubeable. All of these are considered lifetime joints so they don't have grease zirks on them anymore. In the past, maybe the 90's, they stopped putting them on ball joints etc. so that they would wear out sooner. The zirks were on the driveshafts, idler arms, sometimes on rear leafsprings etc. I had a Mitsubishi Montero that had 17 greaseable booted joints. So what I'm asking is if anybody knows what the factory grease was in these boots. I will be greasing these anyway but sometimes one grease when mixed with another cause the other to breakdown and turn to liquid.

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2004 X5 3.0 Auto 140k
2005 325xi Auto 108k
1988 325ix 5spd 279k