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

MP HD Heavy Duty Corrosion Protection

Heavy-Duty Corrosion Protection

Corrosion

Protection

AMSOIL Heavy-Duty Metal Protector (AMH) has been reformulated to provide improved performance as a corrosion inhibitor.

MPHD is an easy-to-use, spray-on product that effectively protects metal surfaces that are exposed to the damaging effects of salt, moisture or chemical corrosion. It is ideal for steel, iron, aluminum, brass, copper and other metal surfaces exposed to water, dirt or road salt.

• Protects metal from the effects of water, salt and humidity
• Excellent long-term protection against corrosion
• Displaces water and prolongs equipment life
• Leaves a dry, long-lasting, wax-like film
• Resists dirt
• Sprays into hard-to-reach places

Quick-Drying, Long-Lasting Formula

The new Heavy-Duty Metal Protector formula provides a dry time of two hours, and a total cure is reached at 12 hours. Depending on the application, how it’s used and the operating environment, protection can last up to several years.

What About Lubrication?

MPHD still provides some lubricating properties, but its primary focus is corrosion protection. We know many customers use MPHD as a chain lube. We recommend converting to AMSOIL Chain Lube.

Applications

Automotive and trailer undercoat, spare tire carriers, battery terminals, tailgate hinges, handheld tools, snow plows, mower decks and blades, snowblowers, skid-steer attachments, farm machinery, fork lifts, metal gates/fences and much more.

Price Adjustment

With the improved performance of the formula, pricing has increased. Even with the price adjustment, both wholesale and suggested retail prices are very competitive in the corrosion inhibitor market.

We tested MPHD’s corrosion-prevention properties on both aluminum and steel. The three aluminum pieces in the upper left were treated with MPHD on their lower halves, while the three aluminum pieces in the upper right were untreated. The three steel pieces in the lower left were treated with MPHD on their lower halves, while the three steel pieces in the lower right were untreated. Following treatment, the pieces were placed in a 5 percent saltwater bath for one hour, removed and allowed to dry for 23 hours. This process was repeated for two weeks. As seen in the pictures, the portions treated with MPHD show no signs of corrosion.

Metal treated with MP HD remained corrosion free