Abstract: The present invention provides a lubricant additive composition which functions both as a friction reducing agent and as an extreme pressure additive, and also has the ability, when incorporated in a lubricant, to improve substantially the low temperature viscosity characteristics of the lubricant. The composition, in one form, comprises:(1) about 35% by weight of 24% lead naphthenate solution in an organic solvent therefor;(2) about 40% by weight of an oil having the following formulation:97.4%-93.1% HVI 300 Neutral Paraffinic Base Oil0.05%-0.15% anti-oxidant0.0005%-0.005% anti-foaming agent0.5%-1.5% anti-rust compound1.0%-2.0% oiliness additive1.0%-3.0% anti-wear compound0.005%-0.25% pour point depressant; and(3) about 25% by weight of diesel oil (preferably desulfurized diesel oil).