Join Date: Sep 2005
Location: Damascus, Oregon
I use the Lucas product all the time but in a narrow application. The ten year old Freightliner I own and drive has over 1,300,000 miles on it. I use Lucas at about 20% in the crankcase.
That being said: I don't think I would do that in the Intrepid, or any newer engine. Lucas is a oil thickener and should be used only in engines that are going run for extended periods, or are well worn.
While providing superior protection once warmed, in a cold engine, Lucas might actually delay lubrication during a cold start. For my Freightliner which runs days at a time, cold start is not a problem, but for a Intrepid that need full oil pressure at very cold temperatures several times a day, Lucas/STP or any oil thickening additive might be a bad idea.