https://www.marvelmysteryoil.com/media/ ... ry-oil.pdf
Oh, one piece the quick glance at MSDS won't provide is what happens to these basic ingredients under combustion... which is where the mild help as a lead scavenger will come from.
Mike, I agree.... The path to approval for anything aviation related is not impossible, it is just often times not worth the time or monetary investment for some, particularly those with decades of sales history without the approval. A casual glance at the experimental parts market place should validate that.
And yes, I also use Camguard. Mostly because it brings my economical choice of oil up to a reasonably modern state. And I choose that oil mostly because it allows me to go from break-in to TBO without changing oil types, brands or weights at such a critical time in an engines life .
Dog, I apologize for the inaccuracy, I thought I had read two of your CT blade failures were the PMA'd ones.... never the less, my point was that neither FAA approval, nor it's lack of, is a guarantee for longevity. I DO agree that following approved procedures will undoubtedly net safer results than veering off into uncharted waters with zero due diligence. But I don't think we're discussing a particularly unheard of practice or substance here.
Funny you should point out that your engines were ran for >1000/hrs/yr. As a matter of pure speculation, I would bet that MMO has been ran for in excess of 1,000,000/hrs on varying engines throughout the country. So, it's about time an engine or two lunches itself while on the peppermint diet... And while there are certainly good ways to handle blowing out lead formations in a 18 cyl. R2800 double wasp, I see no reason why the average A-65 owner (a far more likely demographic of this forum) on the site who may or may not have a mixture control, shouldn't investigate all of his scavenging options..... or he can just get handy with a spark plug wrench and a rope
I find myself coming across as a sounding board for MMO here
which I am really not. If there were an FAA approved counter part as easily available at a similar price point, I would likely lean that way (no pun intended) as a simple matter of keeping things legal and legit. I honestly believe that many facets of this flying thing are just simply not a one size fits all... I recognize that there are things that fit my flying world quite well, that I would probably not recommend to some folks, and that there are facets of other folks (even close friends) flying regimens that have no place in my world. When asked I might offer the reasoning behind why I elect to do something a particular way, and I appreciate someone such as yourself offering why I might consider another way. That's the thought process part MTV alluded to.... works for me 
Take care, Rob
