Sorry for the dumb question, but I keep seeing references to "SOPUS", its not in the Acronym list in the General forum.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=119316#Post119316
Thanks
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=119316#Post119316
Thanks