Urine will work if you can make it stop evaporating and get the viscosity correct. After all, we just need to prevent the metal to metal contact. Smells bad though.
Until then, Amsoil 10-W-40 motorcycle oil. I bought two cases +(all he had) of the Amsoil from a dealer who had bought out another and didn't want the bike oil. He sold it to me for $2.50/QT. After that runs out, I'm going to switch to the Rotella 15-W-40 synthetic. If it is good enough for Pat and lots of others here at BA.com, it's good enough for me.
