Wow since you guys are mentioning avblend, i went and looked it up. $20 for a 12 oz can which is supposed to go in duing one oil change ! Wow !! The FAQ reads like a late night infomercial on home shopping network, micro-molecules and all. Although that will be doing HSN a disservice.
Anyway i dont use camguard and fly regularly - poll would not accept my response. I have been using all sorts of oil, aeroshell 100w, aeroshelll 15w-50, phillips xc 20w50, exon elite 20w50. I think i'll stick with the exxon elite - i think some publication, prolly avweb found the least amount of rusting with this oil.