360 Duster exhaust leak or lifter ticking

Its lucas break in oil additive. You can just leave it in thru the life of the oil change. There is a great discussion of the vri "racing oil" and exactly how much zink it contains but $7 buys almost nothing by the way of replacing engine parts. Another option is the amsoil z rod oil formulated specifically for flat tappet valve trains with extra anticorrosive additives for engines that sit for extended times.