[A bones]

I have used MMO in the crankcase (1qt) of all (eight) new motors since 1970, for the break-in change: no adverse effect. I have run it as a winter additive in dire weather, no prob. Also I have u sed it in the gas tank in both old motors and new.
One particular case was a 351 Windsor in a E250, I bought it with a hundred and eight thousand on it. It would back fire, diesel, etc when turned off. The symptoms left and power on hills improved with about seven fill ups. My first experience was a '49 Dodge I had in 1965 it was a smoker I used MMO in the crankcase, the problem was decreased though not eliminated.