The STP 80W-90 Gear Oil is manufactured from high quality base oils and additives to provide excellent load carrying ability, extreme pressure properties, wear resistance, oxidation stability and protection against rust and corrosion. It is recommended for complete top/off or refill of all non-limited slip passenger car and light truck conventional differentials requiring a SAE 80W-90 GL-5 gear oil; in limited slip applications for top-off only. STP 80W-90 Gear Oil contains sulfur and phosphorous extreme pressure additive metals and is recommended for use where GL-5 oil is required. Always consult the owner’s manual for instructions and proper application requirements.