You can still get the Skil grease and oil, but Dewalt / Porter-Cable makes some that is a bit less expensive and will still do the job.
Here are the dewalt part #'s:
dewalt part # 875914 for grease. http://www.toolsandmachinery.com/product_info.php?products_id=10106
dewalt part # 803442 for oil. http://www.toolsandmachinery.com/product_info.php?products_id=97073
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