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Motor Oil Test and Comparison

AMSOIL vs. Mobil 1

409,000-Miles Without An Oil Change

AMSOIL Excels in API Sequence IIIF Performance Test

Motor Oil Performance Tests & Comparisons

Temperature Extremes Call For Superior Motor Oils

Why Harley-Davidson Owners Choose AMSOIL

Synthetic Motorcycle Oil & Harley-Davidson Warranty Issues

AMSOIL Synthetic Gear Lube Outperforms Valvoline Gear Lube

8.2% More MPG With AMSOIL Synthetic Lubricants

AMSOIL Proves Superior In Clark County Field Test

AMSOIL Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil is Correct Choice for Jeff Foster Trucking

AMSOIL Products Improve Efficiency and Reduce Operating Costs for Gerlach Trucking

What is the Noack Volatility Test?

What is the Four-Ball Wear Test?

What is TBN?


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Automotive Oil And Motorcycle Oil Are Not The Same

Motorcycles have specific requirements that automotive oils may not address.

Dan Peterson, Vice President, AMSOIL Technical Development

Dan Peterson
Vice President,
Technical Development

One of the sure signs of summer is the abundance of motorcycles operating on the roads across North America. And if it seems like there are more motorcycles than ever on the highways and byways, that's because there are. In 2012, nearly 9.5 million motorcycles were registered in the U.S. alone. That figure has grown by more than 47% since 2002, when the total was slightly more than 5 million. Motorcycle culture and the thrill of the open road bring thousands of new riders and enthusiasts into the hobby every year. Although many "gear heads" love working on their bikes, few want to be doing repairs or experiencing downtime from riding that could be prevented by basic maintenance. As with any vehicle powered by an internal combustion engine, proper lubrication is essential to ensure performance and longevity.

In the past, it was common for motorcycles to run on engine oils designed for four-stroke automobile engines. And if you spend any time on online motorcycle forums, you'll see plenty of folks still advocating the use of automotive oil for motorcycles. What is their rationale? They're looking to save a couple bucks on a quart of oil, as the majority of oils blended specifically for motorcycle applications are more expensive per quart than their automotive counterparts. But is using auto oil in your motorcycle a good practice?

There are several reasons why motorcycle oils are better for your bike than automotive oils.

Motorcycles have fundamentally different lubrication requirements than automobiles. This is due primarily to differences in both engine design and vehicle applications. Motorcycles often operate under more severe conditions than passenger cars. They usually run faster, are air-cooled and share an oil sump between the engine, clutches and gears. The oil, therefore, must lubricate not only the engine, but the transmission and, in the case of wet-clutch motorcycles, the clutches, too. Many automotive oils, because of fuel economy requirements, are now formulated with friction modifiers. In a motorcycle with a wet clutch, these additives cause clutch slip and power loss.

Operating habits are different, too. While many of us rely on a car or truck for year-round day-to-day transportation and for longer road trips, motorcycles are often ridden seasonally, on weekends or on shorter trips. These trips often occur during warm summer weather, when the cooling system has to work even harder. Thus, a motorcycle lubricant must protect against high temperatures and high engine rpm while providing smooth wet-clutch operation and protecting gears and chains from operational pressure extremes. Because of these factors, many motorcycle oils are engineered with high viscosity to help prevent gear pitting, oil burn-off and oil consumption.

Retaining that viscosity is critical to ensure components remain protected. The high rpm and shared oil sumps common to motorcycles create an environment that promotes shearing. In fact, transmission gear sets are the leading cause of shear-induced viscosity loss in motorcycle applications. The oil's shear-stability and viscosity retention are vital for protecting motorcycles.

Additionally, motorcycles are often stored for several months during winter - a time when condensation can cause rust, which accelerates wear and can damage engine components. Rust is also a problem inherent to the shorter drive times motorcycles often endure. If not combated, rust can cause bearing corrosion which results in vibration, noise, increased temperatures and catastrophic failure. Effective motorcycle oils must include rust inhibitors to keep engines and components free from corrosion.

Motorcycle oils must also prevent foam from forming, which happens when air enters the lubricating oil during normal engine and transmission operation. Foam bubbles entering a lubricated area take the place of the lubricant film and compress easily, leading to metal-to-metal contact. Foam also promotes increased oxidation because more of the oil's surface area is exposed to oxygen. An oil's tendency to foam should be considered when selecting an oil for your motorcycle.

For many riders, motorcycles represent significant investments of thousands of dollars. It only makes sense to protect those investments with products tailored to address their specific lubrication requirements. Published, AMSOIL Magazine 07/12.

AMSOIL Signature Series Synthetic Motor Oil

AMSOIL Signature Series Synthetic Motor Oil

AMSOIL Signature Series Synthetic Motor Oils are formulated to meet the latest API SN Resource Conserving and ILSAC GF-5 industry specifications. AMSOIL Signature Series Oils include 0W-20, 0W-30, 5W-30 and 10W-30 and represent the very best motor oils AMSOIL has to offer, allowing motorists to take advantage of maximum extended drain intervals. AMSOIL Signature Series Synthetic Motor Oils are recommended for drain intervals of up to 25,000 miles/one year, whichever comes first (15,000 miles/one year in severe service conditions).

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Premium AMSOIL Synthetic Motor Oils offer the longest drain intervals on the market, unsurpassed protection and performance that effectively extends equipment life and improved fuel economy, saving customers money at the pump and reducing the nation's dependence on foreign oil.



Motorcycle Testimonials

Business Opportunity Testimonials

From The Presidents Desk

AMSOIL Synthetic Diesel Oil Articles and Testimonials

"AMSOIL INC. warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL INC. products are used in full compliance with the company's recommendations and instructions."


AMSOIL synthetic motor oils are formulated to surpass engine test specifications, offering protection far greater than competing motor oils for extended drain intervals. Most synthetic oil manufacturers make no claim to extended drain intervals, deferring to the maintenance schedule provided by the vehicle manufacturer. With its unparalleled oil and warranty program, AMSOIL offers consumers unprecedented protection and economics.

Another AMSOIL First

More than 20 years ago, AMSOIL began using the NOACK volatility test as a comparison tool and measurement of quality. Back then, nearly every oil tested side-by-side with AMSOIL synthetic motor oils failed, and those that passed barely squeaked by. Other oil companies paid no attention to NOACK results until Ford Motor Company made it a requirement for service fill oils, validating what AMSOIL had said all along.

THE NOACK Volatility Test
The NOACK Volatility Test determines the evaporation loss of lubricants in high temperature service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions. AMSOIL Synthetic Motor Oil resists high temperature volatization better than other motor oils. AMSOIL Synthetic Motor Oil maintains peak fuel efficiency and reduces oil consumption and emissions.

AMSOIL Now An ISO Certified Manufacturer
AMSOIL recently received ISO 9001:2000 certification of our Quality Management System (QMS). NSF International Strategic Registrations is the registrar that has verified our QMS meets the requirements of the ISO 9001:2000 standard, the most widely utilized quality standard throughout the world for quality management systems. ISO standards are used by over 300,000 companies worldwide setting rigorous standards for businesses, government and industry.

ISO 9001:2000 is applicable to any manufacturing and service organization providing a framework for system development that focuses on the customer, quality system performance and ongoing improvement. AMSOIL received ISO 9001:2000 registration under the scope: synthetic lubricants blending, packaging, and other fulfillment directly associated with lubricant product.

The ISO certification puts AMSOIL in line with some of the most efficient companies in the world. It is further assurance that the products and services AMSOIL provides will continue to maintain the high level of quality the company always demanded.

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