Until some third-party independent testing is done, it is best to read with caution all the claims made by the makers of additives. The FTC took notice of one several years ago for example. http://www.ftc.gov/search/site/zmax For push rod engines picking an oil like mentioned that is already high in ZDDP is the easiest path. Not the race-oil only versions, though. My 2c. Thanks, Gary H. > -------Original Message------- > We just had an epic thread on Zinc additives. What I decided in the end > was no additives needed, if you choose an oil like this that is already > high in ZDDP........ > http://www.penngrade1.com/Zinc.aspx > > Has anybody used Z-MAX or Bestline oil treatment? ... -- -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxxx For more options, visit https://groups.google.com/d/optout.