502 Engine Oil Improver w/ MolyXP (New MolyXP & TBN Booster Formula) A concentrated oil conditioner that adds superior performance to ordinary engine oil Formulated with Moly XP . . . an advanced anti-wear, friction reducer that eliminates metal-to-metal contact Reduces engine friction, wear & operating temperatures  Includes a TBN booster that improves resistance to acidic corrosion Lengthens oil life  Reduces sludge, gum, varnish  Quiets engines  Increases fuel economy  Lengthens engine life Recommended for highway, city, off-road & stationary use  For car, truck, heavy equipment, diesel, gas, propane & butane engines using API CJ-4, API SN or earlier oils