Hello to all. Does any one know when Chrysler started using the heat exchanger in the PCV line as shown in the "Is your 2.7 burning oil" sticky on page 4, post # 56? I have a 98 and a 03 and neither one has it. Wondering if this is part of the sludge fix. There is an upgrade for the windage tray and oil pickup tube but I don't know if it has any thing to do with the sludge fix. Both of my 2.7's have had not one problem but I would like to keep it that way. It would be nice if there was a list of upgrades but it seems to be a nuclear secret. I have a lifetime friend who is a parts manager at a Dodge dealer and all he can pry out of anyone is that it was a crankcase ventilation problem. Is that what the fix was for all the toyota and vw's? I'm sure we would all like to know.