Slick 50 S 750001 Supercharged Full Synthetic Engine Treatment, 15. Fluid_Ounces Will not cause corrosion of engine components 750001 is the new model number which is replacing model number 41306032 Compatible with all types of motor oil Safe for all automotive gas engines, will not void manufacturers' warranties Slick 50 Engine Treatment combines Slick 50 protection chemistry with a fully formulated 10W-30 motor oil to provide protection against friction and heat.