Castrol 37527 Syngear CD 50 Gear Lubricant - 35 lb. Formulated with 100 percent synthetic base stocks to provide greater load carrying ability and excellent thermal stability for greater fuel economy and longer equipment life Outstanding shear stability provides viscometric stability under all operating conditions for significant fuel savings through extended service intervals Contains an anti-wear additive as well as rust, oxidation and corrosion inhibitors to protect bearing and gears and reduces down time Meets or exceeds all manufacturers' warranty requirements for vehicles or transmissions where an Eaton Road ranger PS164REV7 approved transmission lubricant is required