I'd like to hear the answer to this question, too. In a message dated 6/27/2007 7:55:53 A.M. Pacific Daylight Time, Y1TopBanana73@xxxxxxxxx writes: So am I hearing that since additives are changing, I should probably not run Mobil 1 in my Poly motor as I may wipe my solid lifters as well? Bill M 65 Coronet 500 'vert ************************************** See what's free at http://www.aol.com. [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.