These are interesting: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=230102681714&ssPageName=MERC_VI_RUPX_Pr4_PcY_BIN_Stores_IT&refitem=230100866680 If these are $99 used, I wonder what they are new? If the casidiam doesn't wear off, it probably eliminates a lot of the problems with oil. Ken