Here's the breakdown:
* GL-4: This is the API (American Petroleum Institute) service classification for gear oil suitable for manual transmissions and differentials in older vehicles.
* Viscosity: The recommended viscosity for your 1988 300ZX Non-Turbo's transmission and differential is typically 75W-90 or 80W-90. Check your owner's manual for the exact recommendation.
Important Notes:
* Check your owner's manual: Always refer to your 1988 300ZX Non-Turbo's owner's manual for the most accurate information on the specific type of gear oil and viscosity required.
* Synthetic vs. Conventional: While conventional gear oil is generally fine for older cars, synthetic gear oil can offer some advantages, including better performance at extreme temperatures and longer lifespan.
* Consult a mechanic: If you are unsure about which gear oil to use or how to change it, consult a qualified mechanic.
Changing the gear oil in your 300ZX is important for maintaining the health and performance of your transmission and differential. Regular gear oil changes can help prevent wear and tear, reduce noise, and ensure smooth shifting.
