Type: Corrosion Inhibitor. It provides protection against corrosion in both open spaces and hollow voids. While topping up the oil at that frequency may be annoying and possibly expensive, there is generally nothing to worry about.
Bilt Hamber Dynax-S50 Extreme Duty Anti-Corrosion Wax S50 - 700ml Aerosol
Bilt Hamber Electrox Zinc-Rich Anti-Corrosion Steel Coating - 400ml Aerosol
Bilt Hamber Hydrate-80 Rust Killer Barrier System Stops Corrosion 0.5L 500ml
Bilt Hamber Hydrate-80 Rust Killer Barrier System Stops Corrosion 1L (1 Litre)
Bilt Hamber Dynax-S50 Extreme Duty Anti-Corrosion Wax S50 - 750ml Aerosol
Bilt Hamber Dynax UC 750ml Anti Corrosion Clear Film Wax Protection Prevent Rust