ACDelco 75W-90 GL-5 Synthetic Axle Lubricant 1 qt — GM OE, extreme-pressure protection

ACDelco 75W-90 GL-5 Synthetic Axle Lubricant is a full-synthetic gear oil designed to protect hypoid gears and differentials under high load, high-temperature, and cold-start conditions while offering long service life and a grape scent for easier handling.

This ACDelco GM Original Equipment axle lubricant (part 10-4016) is a synthetic GL-5 75W-90 formulation engineered for severe-duty applications. It balances resistance to oxidation and thermal breakdown with low-temperature flow, so differentials and axle assemblies stay protected whether you're towing heavy loads, driving at sustained highway speeds, or starting in cold weather. The grape-scented formula makes top-offs and servicing more pleasant than traditional petroleum gear oils.

How does this lubricant perform under heavy towing and high-speed use?

The ACDelco synthetic GL-5 75W-90 is formulated for extreme pressure and high-temperature stability, helping protect gear teeth from wear during long, high-speed runs and heavy towing. Additives provide a robust film that resists breakdown when heat and load increase.

• Meets API GL-5 specification for severe-service gear protection
• High-temperature oxidation resistance reduces deposit formation
• Extreme-pressure additives cushion gear contact under heavy loads

Will this oil flow well at cold temperatures and during winter starts?

The 75W rating indicates good low-temperature fluidity, so the synthetic base allows quicker circulation and gear protection at cold starts. That helps reduce wear during initial operation in colder climates compared with conventional oils.

• Synthetic base promotes faster pumpability at low temperatures
• Maintains protective film even when ambient temperatures drop
• Reduces start-up wear during short trips in cold weather

Is this product compatible with modern differentials and axle assemblies?

Designed to meet GL-5 service requirements, this ACDelco axle lubricant is suitable for many hypoid gear differentials and heavy-duty axle assemblies that call for GL-5 75W-90. Always check your vehicle manufacturer’s recommendation before use.

• Formulated to handle hypoid gear contact pressures typical in rear axles
• Appropriate for applications specifying API GL-5 75W-90
• Use only where GL-5 compatibility is recommended by the vehicle maker

What practical benefits does the grape scent and synthetic chemistry provide?

The grape scent is an added convenience for technicians and DIYers, reducing strong petroleum odors during handling. The synthetic chemistry contributes to longer fluid life, improved thermal stability, and consistent performance across temperature extremes.

• Pleasant grape aroma makes servicing more comfortable
• Synthetic formulation extends service intervals by resisting oxidation
• Cleaner operation with fewer deposits compared to some conventional oils

Who is this for? ACDelco GM Original Equipment 10-4016 GL-5 75W-90 Synthetic Axle Lubricant is aimed at vehicle owners, fleet managers, and technicians who need a reliable synthetic gear oil for severe-service applications—especially when towing, frequent highway driving, or operation in climates with wide temperature swings is common. It’s a good choice when your vehicle’s differential or axle manufacturer specifies API GL-5 75W-90; for unusual materials or limited-slip differentials, confirm compatibility with the vehicle manual or service adviser before switching fluids.