Specially engineered for classic cars. Contains high levels of ZDDP, top-tier additives and rust inhibitors to protect your passion, deliver maximum performance and keep your classic engine free of rust and corrosion in storage.

PROTECTS FLAT-TAPPET CAMS

• Formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear.
• High-zinc, high-phosphorus formulation provides the extra wear protection critical splash-lubricated components require.
• Fights wear to help prevent compression loss for maximum horsepower.

HELPS PREVENT RUST & CORROSION

• Formulated with a unique blend of rust and corrosion inhibitors to ensure maximum protection during long-term storage.
• Prevented rust and corrosion in industry standard testing (ASTM D1748-10) for excellent engine protection.

Z-ROD Delivers Superior Rust Protection

In industry standard testing, AMSOIL Z-ROD completely prevented rust formation while a leading competitor did not.^A

ᴬ Based upon in-house testing of AMSOIL Z-ROD 10W-40 and a leading competitor obtained on 7/25/2019 in ASTM D1748-10.