AMSOIL Z-ROD Synthetic High-Performance Engine Oils – 10w30 and 20w50

Prevents Flat Tappet Camshaft Wear

The lifters and cam lobes on flat-tappet camshafts common to classic and high performance vehicles slide rapidly against one another, producing high friction and heat. The friction between the two components can eventually wear down the cam and affect valve operation, ultimately resulting in lost engine power and reduced efficiency. In addition, these areas are splash-lubricated rather than pressure lubricated like other areas of the engine, which adds extra strain on anti-wear additives like the zinc and phosphorus in zinc dialkyldithiophosphate (ZDDP).

AMSOIL Z-ROD Full Synthetic 10w30 and 20w50 High-Performance Engine Oils are formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear. Its high-zinc, high-phosphorus formulation provides the extra wear protection these critical splash-lubricated components require. Visit our High ZDDP Motor Oil page to see a list of which AMSOIL Synthetic motor oils contain high levels of zinc and phosphorus and their amounts.

Provides Long-Term Protection from Rust and Corrosion

AMSOIL Z-ROD Synthetic High-Performance Engines Oils are formulated with a unique blend of rust and corrosion inhibitors to ensure maximum protection during long-term storage. To prove its effectiveness, AMSOIL submitted Z-ROD Synthetic Engine Oil to the Standard Test Method for Rust Protection in the Humidity Cabinet (ASTM D-1748). This test evaluates the rust-preventative properties of oil under high-humidity conditions, similar to those faced by a covered hot rod in a damp garage. The metal coupon treated with AMSOIL Z-ROD Oil showed no signs of oxidation after 192 hours, while the coupon treated with a leading competitor’s product failed the test after 24 hours.

Applications

AMSOIL Z-ROD Synthetic High-Performance Engine Oil is recommended for older or modified engines requiring either 10w30 or 20w50 motor oil. It meets API SL and earlier specifications, allowing for increased levels of anti-wear additives. ZDDP levels in AMSOIL Z-ROD exceed the limits of API SM and newer specifications.

Service Life

Because engines in classic cars, hot rods and other high-performance vehicles are generally modified, a universal oil change interval recommendation for these applications cannot be given. Responsibility for determining the drain interval duration rests with the owner. As a general service guideline, the maximum drain interval for AMSOIL Z-ROD Synthetic Engine Oil should not exceed 5,000 miles or one year, whichever comes first. In heavily modified engines (e.g. forced induction, nitrous) the maximum drain interval should not exceed 3,000 miles or one year, whichever comes first.

Shipping for Online and Catalog Customers

Online and catalog customers receive FREE standard ground shipping on orders of $100 or more when shipped to a valid address in the continental United States, including APO and FPO military post boxes. AMSOIL does not ship to PO Boxes. The $100 minimum does not include taxes, fees or other charges. For online and catalog retail orders totaling less than $100, a flat shipping rate of $8.50 will apply in the continental U.S.

Please Note: AMSOIL Dealers and Preferred Customers are not eligible for free shipping. Orders containing only clothing and promotional materials totaling less than $20 are subject to $5 shipping and handling.

For more information, please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines

Return Policy

Please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines