sorry if i'm being a bit yes and no but also water and anti freeze will trash the seels as antifreeve has a chemical in it which eats through things so it will reck the seals also my mate done this before and he got through 6 seals in 4 months and its a pain replacing them I will look up what you can put in them and post later EDIT: Cooking Oil will get rancid and changes viscosity. Mineral Oil from the Supermarket is also not a good substitute. You never know what viscosity that stuff has. Mostly a weight of 30 is sold but again, nobody knows for sure, because of the different measurements in viscosity. For emergency work in the middle of nowhere cooking oil, or mineral oil will work....so does water but it all really needs to be flushed out later.