Where can you buy 85w140 GL4 gear oil?

You can buy 85W140 GL4 gear oil at auto parts stores like AutoZone, O'Reilly Auto Parts, or NAPA. It's also available at larger retailers like Walmart and online platforms such as Amazon or eBay. Additionally, specialty automotive shops and some local service stations may carry this specific gear oil. Always check the product specifications to ensure it's suitable for your needs.