For Classic Cars, Hot Rods and High Performance Engines
High Zinc and Phosphorus ZDDP Motor Oil Prevents Flat Tappet Camshaft Wear
AMSOIL Z-ROD Full Synthetic High-Performance Engine Oils (Product Codes: ZRT, ZRF) are specially engineered for classic cars, hot rods and high performance engines. AMSOIL Z-ROD Synthetic High-Performance Engine Oils feature a high-zinc (ZDDP) formulation to prevent wear on flat-tappet camshafts and other critical engine components, along with a proprietary blend of rust and corrosion inhibitors for added protection during long-term storage. Available in SAE 10w30 and 20w50 viscosity grades, AMSOIL Z-ROD Oils are designed to perform on the street and protect during storage.
- High ZDDP motor oil – contains high levels of zinc and phosphorus
- Prevents flat tappet camshaft wear
- Offers rust and corrosion protection during long-term storage
- Recommended for classic cars, hot rods and other high performance engines
AMSOIL Z-ROD Full Synthetic 10w30 High-Performance Engine Oil Product Code Pkg/Size ZRTQT-EA Quart Bottle ZRTQT-CA Quart Bottles (case of 12) AMSOIL Z-ROD Full Synthetic 20w50 High-Performance Engine Oil Product Code Pkg/Size ZRFQT-EA Quart Bottle ZRFQT-CA Quart Bottles (case of 12)
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.
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.
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.
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For more information, please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines
Please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines