AMSOIL Z-ROD® 10W-40 100% Synthetic Motor Oil

AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil is specifically engineered for classic cars and high-performance vehicles. Its formulation is rich in zinc and phosphorus (ZDDP), providing the necessary wear protection for flat-tappet cams, lifters, and rockers that are common in vintage engines. The product's high-zinc formula ensures critical engine components are safeguarded against wear and tear, a key concern for older vehicles or those with high-performance modifications​​. The oil not only fights wear to help prevent compression loss and maintain maximum horsepower but also includes a unique blend of rust and corrosion inhibitors. This feature is particularly beneficial for vehicles that are stored for extended periods, protecting them against internal rust and corrosion. AMSOIL Z-ROD's anti-rust and anti-corrosion additives are carefully blended to provide maximum protection during long-term storage, ensuring that your engine remains in pristine condition, even when not in use.

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This AMSOIL product is available in:

Individual Quart Bottles
Cases of 12 Quart Bottles
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Product Code:

ZRDQT-EA

AMSOIL AMSOIL Z-ROD® 10W-40 100% Synthetic Motor Oil Description

AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil is specifically engineered for classic cars and high-performance vehicles. Its formulation is rich in zinc and phosphorus (ZDDP), providing the necessary wear protection for flat-tappet cams, lifters, and rockers that are common in vintage engines. The product's high-zinc formula ensures critical engine components are safeguarded against wear and tear, a key concern for older vehicles or those with high-performance modifications​​. The oil not only fights wear to help prevent compression loss and maintain maximum horsepower but also includes a unique blend of rust and corrosion inhibitors. This feature is particularly beneficial for vehicles that are stored for extended periods, protecting them against internal rust and corrosion. AMSOIL Z-ROD's anti-rust and anti-corrosion additives are carefully blended to provide maximum protection during long-term storage, ensuring that your engine remains in pristine condition, even when not in use.

AMSOIL Z-ROD® Synthetic Motor Oil

Modern Technology for Classic Cars

AMSOIL Z-ROD Synthetic Motor Oil is specially engineered for classic and high-performance vehicles. It features a high-zinc 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. Z-ROD Synthetic Motor Oil is designed to perform on the street and protect during storage.

Protects Flat-Tappet Cams

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 such as the zinc and phosphorus in zinc dialkyldithiophosphate (ZDDP).

AMSOIL Z-ROD Synthetic Motor Oil is 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.

Provides Long-Term Protection from Rust & Corrosion

Z-ROD Synthetic Motor Oil is 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 Motor Oil to the Standard Test Method for Rust Protection by Metal Preservatives in the Humidity Cabinet (ASTM D1748-10). This test evaluates the rust-preventive 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 Synthetic Motor Oil showed no signs of rust.

¹Based upon in-house testing of AMSOIL Z-ROD 10W-40 and a leading competitor obtained on 7/25/2019 in ASTM D1748-10.

AMSOIL Z-ROD®️ 10W-40 Synthetic Motor Oil
  • Engineered for classic vehicles
  • High-zinc formula
  • Protects against rust during storage

TYPICAL TECHNICAL PROPERTIES

AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil (ZRD)

Kinematic Viscosity @ 100°C, cSt (ASTM D445) 14.9
Kinematic Viscosity @ 40°C, cSt (ASTM D445) 97.5
Viscosity Index (ASTM D2270) 159
Flash Point, °C(°F) (ASTM D92) 242(468)
Fire Point, °C(°F) (ASTM D92) 260(500)
Pour Point, °C(°F) (ASTM D97) -39(-38)
NOACK Volatility, % weight loss (g/100g) (ASTM D5800) 3.1
High-Temperature/High-Shear Viscosity @150°C, 1.0 X 10^6 s.^-1, cP (ASTM D5481) 4.3
Four-Ball Wear @ 40kgf, 75°C, 1200 rpm, 1hr, scar diameter, mm (ASTM D4172) 0.33
Total Base Number (TBN) (ASTM D2896) 9.0

APPLICATIONS

Use Z-ROD Synthetic Motor Oil in engines requiring either 10W30, 10W-40 or 20W-50 motor oil. Z-ROD Synthetic Motor Oil meets API SL and earlier specifications, allowing for increased levels of anti-wear additives. ZDDP levels in Z-ROD Synthetic Motor Oil exceed the limits of API SM and newer specifications.

COMPATIBILITY

AMSOIL Z-ROD Synthetic Motor Oil is compatible with conventional and other synthetic motor oils. Mixing AMSOILZ-ROD Synthetic Motor Oil with other oils, however, will shorten the oil’s life expectancy and reduce its performance benefits.

Z-ROD Synthetic Motor Oil is safe for automotive seals. Aftermarket oil additives are not recommended for use with Z-ROD.

SERVICE LIFE

Because engines in classic cars, hot rods and other performance vehicles are generally modified, a universal oil drain 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 Z-ROD Synthetic Motor Oil should not exceed 5,000 miles or two years, whichever comes first.

AMSOIL PRODUCT WARRANTY

All AMSOIL products are covered by the AMSOIL Limited Warranty. For complete information visit AMSOIL.com/warranty.aspx.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available at AMSOIL.com or upon request at 715-392-7101. Keep Out of Reach of Children. Don’t pollute. Recycle used oil and bottle.

AMSOIL Z-ROD® 10W-40 100% Synthetic Motor Oil Reviews

5

star rating

Best high zinc motor oil

Amsoil ZRod is the best, high zinc content motor oil that I've found. I used Amsoil Break-In Oil first, and now I'm using ZRod in my freshly rebuilt 1937 Oldsmobile straight 8.

5

star rating

Best oil ever

I recommend this oil to everyone with a older hot rod

5

star rating

Old cars happy

Dont use the old machine as much as I should.... but its protected

Read More Reviews

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