Can I Use 75W-80 Instead Of 80W-90 – A Complete Drivetrain Protection
In short, using 75W-80 gear oil instead of the manufacturer-specified 80W-90 is generally not recommended. While it may offer slightly better cold-weather performance, its lower viscosity at operating temperatures can lead to reduced gear protection, increased wear, and potential damage, especially under heavy loads like towing or off-roading. Always consult your owner’s manual first. You’re…