Description Penrite Pro Gear GL-4 75W-90 is a fully synthetic gear oil, containing purpose designed additives for long service life and excellent load carrying capacity. It is recommended for use in manual gearboxes, transfer cases and transaxles in passenger cars, light commercials, 4×4, trucks, construction, earthmoving and agricultural equipment that specify the use of an API GL-4, SAE 75W-90, 80W-90 or SAE90 gear oil. Also suitable for use where and API GL-3, SAE75W-85 gear oil is required. Not suitable for use in differentials that require API GL-5 or higher.
