Came across a very nice gasoline-faq through a reference at the dyi_efi-list. It is one of the best faq's I've ever seen: http://www.vtr.org/maintain/gasoline-faq.html ............................................ . Hans-Juergen Schneider / hschnei@ibm.net . . 200 Quattro / 90 Coupe Quattro 20V . . Germany . ............................................