Synthetic Oil in Classic Cars

It’s that time of the year again. The excitement of muscle cars, hot rods, and resto-mods hitting the road again is upon us after a long winter. That means it’s time to prepare for car shows, long road trips, and all of the fun things that come with summertime. Using synthetic oil in classic cars, muscle cars, and hot rods has long been known as the best way to maintain peak performance in these vehicles. Following are all of the top AMSOIL oils, additives, and more that you can use in your hot rods to keep them humming along for decades to come.

AMSOIL Break-In Oil

AMSOIL Break-In Oil.
AMSOIL Break-In Oil

Get off the ground running when installing a brand new motor in your hot rod with AMSOIL Break-In Oil!

  • To allow for fast and effective piston ring seating in new and restored racing and other high-performance engines, this formula focuses on engine longevity and is free of friction modifiers
  • Anti-wear additives of zinc and phosphorus secure lifters, cam lobes, and rockers during the crucial break-in time when the rate of wear is at its peak
  • Specifically formulated to increase torque, compression, and horsepower for enhanced performance and power of your engine

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~ Seats Rings Fast and Efficiently

When breaking in a motor, the main objective is to seat the rings against the wall of the cylinder. When rings are seated properly, they increase compression, which will result in maximizing horsepower. This will also decrease the consumption of oil and prevents high-temperature gases produced by combustion from getting into the crankcase.

To accomplish this, the oil has to enable the proper amount of “regulated wear” between the ring interface/cylinder wall while still protecting other vital motor components from wear. Inadequate break-in causes peaks to form on the walls of the cylinder, preventing the rings from properly seating. Meanwhile, the deepest valleys cause excess oil to accumulate and burn during ignition, increasing the consumption of oil.

Excessive wear causes glazing of the cylinder when peaks “roll-off” into valleys, stopping oil from accumulating and properly lubricating the wall of the cylinder. The friction-modifier-free solution of AMSOIL Break-In Oil causes the intense peak on cylinder walls that are freshly honed to partly compress.

~ Prevents Wear on Critical Parts

Since new lifters and flat-tappet camshafts have not been broken in yet, to reach the correct stiffness they must be heat-cycled first. These parts are prone to increased wear while in the break-in process since they’re splash-lubricated, as opposed to other sections of the motor that are lubricated by pressure. AMSOIL Break-In Oil provides high amounts of zinc and phosphorus (ZDDP) additives that are intended to provide resistance against wear during this crucial time.

~ Film Strength is Increased

Aftermarket components designed to maximize horsepower and torque are often used in racing and high-performance motors. The added tension will cause the oil film that protects main and rod bearings from dangerous metal-to-metal interaction that causes rupturing. AMSOIL Break-In Oil‘s base stock oils have additional film stability to prevent wear from degrading bearings.

AMSOIL Engine Assembly Lube

AMSOIL Engine Assembly Lube.
AMSOIL Engine Assembly Lube

Engines that haven’t been fully constructed will sit idle for long periods of time. During this phase, a high-performance engine assembly lube should be added to the parts to provide wear defense, discourage corrosion, and aid in the prevention of deposits forming. It is formulated to dissolve in oil, thus reducing the clogging of oil ports.

~ Strongly Sticks to Components

Since engine construction can take anywhere from a couple of days to several months, utilizing a high-quality engine assembly lube that adheres to components for long periods of time is important. AMSOIL Engine Assembly Lube is made with a high-viscosity base stock oil and a proprietary tackifier to provide a lengthy, tenacious grip.

~ Extraordinary Protection Against Wear

Engines run with hardly any oil pressure at initial startup, putting camshaft lobes, rocker arms, bearings, lifters, and other vital parts at risk of failure and wear. AMSOIL Engine Assembly Lube provides high amounts of anti-wear additives for adequate protection, in addition to preventing wear by tenaciously sticking to components.

~ Helps Prevent Corrosion and Rust

A partially built engine can remain in storage for extended periods of time, causing oxygen and moisture to develop rust on metal surfaces that are exposed. AMSOIL Assembly Lube includes corrosion and rust inhibiting additives, which preserve engine parts while the engine is not in use.

~ Prevents Port Clogging by Dissolving in Oil

Assembly lubes that are grease-based will raise the risk of clogged oil ports if not fully ingested during the initial start, possibly resulting in motor failure. Engine Assembly Lube by AMSOIL is specifically formulated to dissolve in oil, thus maintaining clean oil ports and preventing the formation of deposits in the oil pain and under valve covers.

AMSOIL Z-ROD® Synthetic Motor Oil

AMSOIL Z-ROD® 10W-30 Synthetic Motor Oil.
AMSOIL Z-ROD® 10W-30 Synthetic Motor Oil

If you’ve asked yourself the question “Can I use synthetic oil in my old car?” then the answer is an unequivocal YES! AMSOIL has created AMSOIL Z-ROD® Synthetic Motor Oil specifically for this purpose.

AMSOIL Z-ROD® Synthetic Motor Oil is a high-quality oil specifically formulated for classic hot rods and muscle cars.

It is designed specifically for classic and high-performance vehicles to operate and maintain horsepower on the road while still protecting them in storage.

It has a formula high in zinc that covers flat-tappet camshafts and other vital motor parts, as well as a patented combination of corrosion and rust inhibiting additives for extra protection during extended storage periods.

This synthetic engine oil is the best oil for older cars and is available in three viscosities: 10W-30, 10W-40, and 20W50.

~ Keeps Flat-Tappet Cams Protected

AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil.
AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil

Z-ROD® contains a high concentration of ZDDP to support flat-tappet cams, rockers, lifters, and other components prone to wear. The proprietary formulation high in phosphorous and zinc offers the additional wear resistance needed by components that are splash-lubricated. This synthetic motor oil combats wear to aid in the prevention of compression failure, allowing for optimum horsepower.

~ Prevents the Formation Corrosion and Rust

AMSOIL Z-ROD® 20W-50 Synthetic Motor Oil.
AMSOIL Z-ROD® 20W-50 Synthetic Motor Oil

Z-ROD® contains a proprietary combination of corrosion and rust inhibiting additives to provide optimum defense during extended periods of storage. Z-ROD® has excelled at preventing corrosion and rust in industry-standard tests (ASTM D1748-10), providing outstanding motor security.

AMSOIL Premium Protection Synthetic Motor Oil

AMSOIL Premium Protection 10W-40 Synthetic Motor Oil.
AMSOIL Premium Protection 10W-40 Synthetic Motor Oil

AMSOIL Premium Protection Synthetic Motor Oil has been around for a long time and has a devoted following due to its outstanding success as a hot rod and vintage car oil.

Enthusiasts recognize the significance of using an oil with high levels of zinc. This AMSOIL oil is a hallmark lubricant with high volumes of zinc, available in viscosities of 10W-40 and 20W-50. It provides excellent support for other elevated-pressure parts such as pistons and bearings, allowing engines to operate at optimum efficiency.

AMSOIL Premium Protection Synthetic Motor Oil is designed to offer outstanding protection and quality results in a large range of challenging applications. Its one-of-a-kind mixture of synthetic base stock oils and an excellent additive combo translates to a lubricant framework that outperforms the specifications of most diesel or gasoline applications that demand 10W-40 or 20W-50 engine oil.

Premium Protection Synthetic Motor Oil is suitable for higher mileage vehicles exposed to stress, hot weather, hard hauling, trailer dragging, or off-road operation. It adds anti-wear defense to engines with valve springs under high levels of tension and flat-tappet cams. AMSOIL Premium Protection Synthetic Motor Oil outperforms traditional oils in terms of versatility and efficiency.

AMSOIL Premium Protection 20W-50 Synthetic Motor Oil.
AMSOIL Premium Protection 20W-50 Synthetic Motor Oil

~ Excellent Protection Against Wear

Premium Protection Synthetic Motor Oil is a high-viscosity motor oil designed to prevent metal-on-metal interaction. It prevents shear-induced viscosity degradation and is developed with a strong zinc treatment and other anti-wear compounds for superior protection of cam lobes, bearings, gears, and other parts exposed to high pressures in transmissions and engines. Premium Protection Synthetic Motor Oil extends the life of your equipment.

~ Compatible with Wet Clutches

Since it has no friction modifiers, Premium Protection Synthetic Motor Oil is suitable for vehicles, repair machinery, and other wet-clutch transmission applications. It has been designed to avoid clutch slippage and glazing, resulting in seamless clutch activation and lengthy, reliable transmission operation. Premium Protection Synthetic Motor Oil helps to prolong the life of transmissions by reducing clutch wear.

~ Resists High-Temperature Degradation and Oxidation

Premium Protection Synthetic Motor Oil is designed to solve the thermal shortcomings found in traditional petroleum oils. Oxidation, burn-off (volatilization), and unnecessary deposit accumulation caused by elevated heat are significantly decreased. The thickening of viscosity is managed, and motors run quieter, facilitating smoother running and increased engine longevity in air- or liquid-cooled motors.

Furthermore, the high viscosity of AMSOIL 20W-50 Synthetic Motor Oil can help minimize engine oil usage in equipment that encounters greater use rates when lower-viscosity oils are used.

~ Extended Drain Intervals

Outstanding additive and synthetic base stock oil technology outperforms all diesel and gasoline engine specifications. Premium Protection Motor Oil is engineered to disperse soot, nullify acids, and outlast traditional oils.

AMSOIL Miracle Wash Waterless Wash and Wax Spray

AMSOIL Miracle Wash Waterless Wash and Wax Spray.
AMSOIL Miracle Wash Waterless Wash and Wax Spray

The majority of classic car owners are dedicated to continuously maintaining their vehicle’s image in sync with its high performance.

AMSOIL Miracle Wash is a must-have in the trunk or glove box of anyone who wants to maintain their vehicle’s brilliant external shine. Simply spray and scrub to quickly remove blemishes on soiled surfaces. It leaves an amazingly shiny finish on vehicles that protects against light dirt, dust, and harmful UV rays.

AMSOIL Gasoline Stabilizer

Gasoline Stabilizer.
AMSOIL Gasoline Stabilizer

AMSOIL Gasoline Stabilizer is critical for ensuring your vehicle is prepared to hit the road the next year when it comes time to plan for storage at the conclusion of the season. In as little as thirty days, gasoline will start to degrade. Treat your fuel tank before retiring it for the winter to help avoid fuel loss and bad engine efficiency when you start using it again in the spring.

Gasoline Stabilizer allows for smoother startup by preventing fuel deterioration during storage for up to 12 months. To keep storage tanks and fuel systems clear, it resists the formation of varnish and gum. In ethanol-blended fuel, it is efficient. Both two- and four-stroke engines, including motorbikes, snowmobiles, boats, ATVs, edgers, tillers, mowers, automobiles, trucks, snowblowers, chainsaws, turbines, and farm and building machinery, are compatible with this product.

~ Cuts Down on the Need for Maintenance

  • By eliminating toxic deposits from accumulating in the tank and fuel system, it helps to minimize repair time and costs
  • It reduces the need to clean or repair carburetors after extended storage
  • Fights dangerous rust to keep the fuel system safe and operational

~ Keeps Vehicles Running Consistently

  • It eliminates the need to remove fuel from vehicles before storing it for an extended period of time
  • Provides assurance that the vehicle will not only start when requested but will also work properly


DOMINATOR® Octane Boost

Previously, engines were designed to run on leaded fuel. As a result, vintage and collector cars often necessitate the use of a lead replacement in order to conserve the components that were engineered for the gasoline of yesteryear.

AMSOIL DOMINATOR® Octane Boost works well as a lead replacement in older engines. It boosts octane by up to four points, which helps minimize engine knock and boost combustion while also making fuel burn cleaner.

AMSOIL DOMINATOR® Octane Boost (AOB) boosts engine reaction and power in both two- and four-stroke gasoline-powered engines by boosting octane by up to four numbers. Just one application eliminates motor knock, increases ignition, and aids in cleaner fuel combustion.

DOMINATOR® Octane Boost is the octane boost that is suggested for both high-performance racing and off-road and racing applications. Most consumers find that one 12-ounce bottle of DOMINATOR® Octane Boost for every 15 gallons of fuel offers the best performance improvement. DOMINATOR® Octane Boost is also an outstanding lead replacement at the same treat levels in collector cars, older off-road engines, and leisure vehicles.

~ What’s “engine knock” and why is it important?

The term “knock” refers to the unregulated and explosive burning of a hydrocarbon fuel, such as gasoline, in the combustion chamber. It makes a banging or pinging sound, drains the engine’s power, and can cause significant motor damage if left untreated. The octane amount of a fuel determines its propensity to knock. Lower numbers indicate greater knock proclivity, whereas higher numbers indicate greater knock power. Knock can be removed by using the proper octane number. Luckily, this is what AMSOIL DOMINATOR® Octane Boost was designed to prevent.

AMSOIL Engine Fogging Oil

AMSOIL Engine Fogging Oil.
AMSOIL Engine Fogging Oil

Any engine that would be stored or inactive for an extended period of time should be handled with Engine Fogging Oil first. Applying a shot of lubricant to the cylinders saves them from rust, deterioration, and damaging dry starts the next year as you start up your hot rod or vintage vehicle.

Water vapor can condensate inside the engine during times of inactivity as a result of variations in ambient temperatures.  Surface corrosion occurs on piston rings, cylinder liners, anti-friction bearings, and iron/steel contact surfaces on rotational seals as this condensate comes into close contact with iron and steel parts. Long stretches of storage time can also cause cylinders to get dry, which can result in irreversible damage until the vehicle is removed from storage and dry-started.

Most two- and four-stroke engine oils are designed to have an attraction to engine part surfaces, serving as a shield to prevent condensate from touching and corroding engine components. However, the efficacy of motor oil in this region deteriorates with time.

Engine Fogging Oil (FOG) has excellent film retention, which protects against rust and dry starts over time, maximizing engine life and lowering maintenance costs. Its aerosol spray formulation allows for neat and straightforward applications while covering more components and providing total oil distribution, which is particularly useful in horizontal cylinder orientation applications.

Conclusion: Use AMSOIL Synthetic Oil in Classic Cars, Muscle Cars, and Hot Rods!

Meanwhile, enjoy the open road knowing that your engine and parts are covered by products made by a manufacturer that has been producing high-quality, high-performance lubricants since classic hot rods were rolled off the assembly line. Choose AMSOIL today!

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