Best Engine Oils for High-Mileage Trucks (2025 Guide)

Why High-Mileage Engines Need Different Protection

Engines past 75,000 miles develop looser tolerances, higher operating temperatures, and more internal wear. Light factory oils often become insufficient under load.

Top Oils for High-Mileage Trucks

• Best Overall: 0W-40 for maximum protection and film strength
• Best for balance: 5W-30 full synthetic
• Best for mild climates: 0W-20 synthetic

Why 0W-40 Is Often the Best Choice

• Superior high-temperature stability
• Better wear protection for aging components
• Reduced noise on engines with early lifter or valvetrain wear
• Less oil thinning during long highway pulls

Common High-Mileage Problems Reduced by Heavier Oils

• Ticking or tapping noises
• Oil consumption
• Loss of oil pressure when hot
• High-heat breakdown

Internal Link: Learn why many high-mileage owners switch to Mobil 1 0W-40 Supercar.