AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated for hard-working equipment, providing clean engine operation and maintaining power and fuel efficiency for superior engine performance. AMSOIL Heavy-Duty Synthetic Diesel Oil flows dependably in cold temperatures for easier startup and improved engine protection. It delivers a low rate of volatility (burn-off), reducing oil consumption during operation and passing less oil vapor into the combustion chamber. As a result, it provides up to 66 percent less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.

AMSOIL Heavy-Duty Synthetic Diesel Oil is engineered to provide 4x better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, giving consumers an edge in keeping trucks and equipment operating at peak performance. Available in 15W-40, 5W-40 and 10W-30 viscosities.

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