A couple of years ago I contacted them to ask if they still produced something I could use for a FT cam and lifter setup. I asked for Zinc levels in which products. The info that I got said they still produced the 10-40 and 15-40(only these two weights) with 1300PPM. Within the threshhold needed. So that's what I've been using for about 5 yrs now. So far so good. Cam was already broke in so that may also be why it is lasting. Although I run fairly heavy valve springs(310# over the nose) which dose not lend itself to cam and lifter longevity either.