Since Lanolin is supposedly the ester in Auto RX that does all the magic, why couldn't the Lanolin be used by itself in its pure form? The melting point of Lanolin is quite low at 107F, so it wouldn't be hard to melt it just prior to pouring it into the sump, or even pre-mixing it with the fresh oil. I found a source for Lanolin at a pretty decent price. It's USP certified or whatever. I'm seriously tempted to try it in a vehicle that is "expendable", just to see if it might work as well as Auto RX does.