An ashless dispersive monograde engine oil for the lubrication of aviation piston engines operating under severe and very severe conditions.  It has been specially developed to improve anti-wear and corrosion protection.

XPD 80 contains an anti-wear additive similar to TEXTRON Lycoming LW 16702 so it is not necessary to add this to your oil.  This means that the correct proportion of additive is always present without measurement when adding oil to the engine.