[Steve Tinker]

It might look like grease but the bearings in the modern Porsche are a plastic silicon type bearing. Before I replaced my noisy drop links, I prized open the top of the dust seal and injected lithium grease from a pressurised can. It certainly worked but as I was going to replace the drop links, I used the Lithium only as a temporary measure.
Most creaking comes fron either the roll bar bushes or the balljoints - again for a TEMPORARY fix for the balljoints, get a large syringe from the chemist (drugstore?) fill it with Lithium from a pressurised can and inject it into the rubber dust boot. A spot of silicon sealer should then stop any ingress of moisture or dirt.