After-Run Oil should be put into the engine after each session of use to give additional corrosion protection. It also makes a superb general purpose lubricating oil and is supplied in a spouted container.
Hi-Viz fuel dye a specially developed fluorescent colouring additive to give fuel a highly visible red colour which enables the helicopter pilot to see the level of fuel in the tank. It can also be used to distinguish between different fuels i.e. 2 and 4 stroke mixes.