http://www.luboron.com/consumer.shtml

Any idea if this is a good additive, their claim is boric acid when combined with water and sprayed inside the engine forms a coating harder than metal.

thats an interesting question, first time i hear of something like that, im going to do some reasearch about it and will let you know

Thanks, I know Cheveron Delo tranny oil has always used boron instead of corrosive EP additive but for engines, this is news to me.