New AMSOIL Z-ROD® 10W-40 Completes Line-up

Z-ROD® Keeps Classic Vehicles Street-Ready

AMSOIL Z-ROD® Synthetic Motor Oil protects engines on the highway and in the garage.

New 10W-40 viscosity joins the lineup, protecting engines on the street and during storage.

Taking your classic car or hot rod out of storage is an exciting time for enthusiasts. For many, it marks the end of a long winter or lengthy period of inactivity during which their prized car was stored under cover in the garage.

Storage invites engine-damaging corrosion

During that time, rust or corrosion may have formed on engine parts due to humidity and moisture from changes in ambient temperature.

Rust and corrosion can be just as devastating to an engine as dirt or sludge. It can flake off metal and populate the oil with wear-causing particles, which scour bearings, cam lobes and other parts before the filter has a chance to capture them.

AMSOIL fights corrosion

We formulated AMSOIL Z-ROD Synthetic Motor Oil to prevent this scenario.

It contains potent rust and corrosion inhibitors that protect the inside of your engine during storage so you can rest assured it will be ready to roll when you are.

Motor oil has no natural ability to resist rust or corrosion. Instead, special inhibitors must be added to the formulation to keep metal components protected. Not all motor oils contain sufficient rust and corrosion inhibitors to protect engines during long-term storage.

Added ZDDP for added wear protection

Flat-tappet cams, found in many classic cars and hot rods, present another challenge some motor oils aren’t formulated to handle.

Their design makes them especially vulnerable to wear. As the name indicates, the tappet, or lifter, is flat. During operation, the surface of the cam lobe slides rapidly over the surface of the tappet, producing high friction and temperatures. The camshaft and lifters are responsible for triggering the precisely tuned movements of the valvetrain. Here, the use of anti-wear additives becomes crucial.

Zinc dialkyldithiophosphate (ZDDP) is a commonly used motor oil additive that provides anti-wear protection and minimizes lubricant breakdown. ZDDP also exhibits mild extreme-pressure protection. As temperatures in the engine rise, ZDDP decomposes, and the resulting chemistry protects critical metal surfaces.

Because most V-8 engines of the muscle car era came standard with flat-tappet cams, the problem is prevalent to classic-car and hot rod owners.

Modern oils aren’t formulated to tackle this problem. They contain reduced ZDDP levels due to its propensity to harm catalytic converters. For that reason, it’s best to use a high-ZDDP oil formulated specifically for classic cars and hot rods, such as AMSOIL Z-ROD Synthetic Motor Oil. It’s available in 10W-30, 10W-40 and 20W-50.

AMSOIL Z-ROD Synthetic Motor Oil

• Added ZDDP to protect flat-tappet cams
• Long-term rust and corrosion protection

New Motor Oil Specifications

New Motor Oil Specifications in Effect

The automotive industry’s latest specifications, ILSAC GF-6 and API SP, are now effective. AMSOIL is ahead of the game.

Original equipment manufacturers (OEMs) are under pressure to improve fuel economy and reduce emissions. As a result, most new engines today use some combination of turbochargers, direct-fuel injection and variable valve timing to deliver better fuel economy and increase horsepower.

The trend of lighter engine oils to achieve these goals continues with 0W-16 viscosities emerging in the market and 0W-12 and 0W-8 expected to follow. The industry has responded to these advanced engine technologies and ultra-light oil viscosities with two new oil specifications: ILSAC GF-6 and API SP.

The Split: GF-6A and B

The International Lubricant Standardization and Approval Committee (ILSAC) has set a new precedent in the passenger-car motor oil market by splitting its specification into two parts. One of the main differences between the two specifications is compatibility. See the chart below.

Both versions focus on wear protection, prevention of low-speed pre-ignition (LSPI) and improved engine cleanliness. However, GF-6B features a more stringent fuel economy test. Engine oils can easily be identified as ILSAC GF-6A or 6B by the API emblem on the front label of the packaging. A shield represents the GF-6B specification, while the traditional starburst indicates a GF-6A product. Both ILSAC specifications meet the industry-standard API SP specification which is most commonly found in owners’ manuals.

We Are Ready

Our claims about using advanced technology aren’t just talk, and this specification update proves it once again. AMSOIL synthetic motor oils already meet or exceed the new industry standards and require no change in formulation. This is not the first time we’ve been in this position. While the competition works on making major formulation adjustments, we are ready. Our product labels will soon feature the new specifications as inventories of current packaging are depleted.

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For more information on AMSOIL Synthetic Motor Oils click here.

The Best Synthetic Motor Oil

What is the best synthetic motoroil?

AMSOIL provided proof of superior performance for it's Signature Series Synthetic Motor Oil.

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AMSOIL Signature Series has the proof of superiority.

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AMSOIL Signature Series

Signature Series: Maintains Protective Viscosity

The main bearings in your vehicle rely on an oil film thinner than a sheet of paper. When motor oil loses viscosity due to a process called shear, it can fail to provide the required level of wear protection.

Shear (often called mechanical shear) occurs when one layer of oil moves in the opposite direction of another layer of the same oil. This often occurs between the piston and cylinder wall. These two oil films move in opposite directions under intense heat and pressure.

AMSOIL synthetic motor oil features naturally shear-resistant base oils combined with top-tier viscosity improvers to withstand extreme heat and shearing forces. In fact, Signature Series fights viscosity breakdown better than the competition*, providing superior protection of pistons, cams and bearings.

Signature Series stands up to the potentially devastating effects of viscosity breakdown and provides maximum engine protection.

*Based on independent testing of AMSOIL Signature Series, Schaeffer’s Supreme 9000 Full Synthetic, Lucas Synthetic, Valvoline Conventional Daily Protection, Mobil 1 Annual Protection and Pennzoil 5W-30 in the Kurt OrbahnTest. Oils purchased on 5/3/18.

For product information on AMSOIL Synthetic Motor Oil.

AMSOIL Signature Series and Turbochargers

AMSOIL Signature Series Protects Turbochargers

The turbocharger/direct fuel injection combo has emerged as automakers’ favored choice for producing powerful engines and meeting government fuel-economy requirements. The increased airflow turbos generate enables an engine to burn more fuel and produce more power, but this power comes at a cost. The tremendous heat and stress turbos create cause some oils to break down and form harmful bearing deposits through a process known as turbo coking. Over time, turbos can suffer reduced performance or fail altogether.

How Turbos Could Slow You Down

The deposits common to turbochargers can lead to:

• Blocked oil passages, oil starvation and eventual failure
• Reduced turbine speed – resulting in lower boost pressures, reduced performance and poor efficiency
• Oil breakdown and oil burning
• Expensive turbo rebuild or replacement 

The GM Turbo Coking Test

The Turbo Coking Test was designed to simulate the extreme operating conditions of a turbocharged engine. It evaluates a motor oil’s ability to resist deposit buildup in the oil passages and bushings of a turbocharger. Temperature increases within the turbo and the weight of any deposits are recorded.   

Test Parameters

Engine   -  2012 GM 1.4L

Duration   -  2,000 cycles of extreme heat soaks – approximately 537 hours

Measures   -  A motor oil’s ability to resist deposits in a turbocharger’s oil passages and bushings

Simulates   -   High-heat operation of a turbocharged engine 

Requirement   -  Temperature change within the turbocharger limited to 13 percent

Signature Series protects turbochargers 72% better than required by GM dexos1® Gen 21

The GM Turbo Coking Test requires an oil to limit the temperature change within the turbocharger to 13 percent or less to pass the test. Signature Series limited the temperature increase to only 3.6 percent, controlling heat and proving it protects against deposits common to high-temperature engine environments.

For more information or to buy AMSOIL Signature Series Synthetic Motor Oil

1Based on independent testing of AMSOIL Signature Series 5W-30 in the GM Turbo Coking Test as required for the GM dexos1 Gen 2 specification.

*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.