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

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What is the Noack Volatility Test?

What is the Four-Ball Wear Test?

What is TBN?


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Lighter-Viscosity Motor Oils Becoming More Prevalent

The Forthcoming ILSAC GF-6 Specification Will Introduce The Lightest Category To Date, SAE 16.

Dan Peterson, Vice President, AMSOIL Technical Development

Dan Peterson
Vice President,
Technical Development

AMSOIL gasoline motor oil sales are shifting quickly from predominantly 5W-30 to a combination of 0W-20 and 5W-20 viscosity grades. Historically, motor oils have depended heavily on a film of oil to keep engine parts separated, reducing metal-to-metal friction. The idea is that the oil film reduces friction between parts in motion, reducing wear and improving performance. Now the industry is working on reducing hydrodynamic friction between moving parts, something very different, which we will call fluid friction. Reducing fluid friction requires reducing internal friction of the lubricant. This is done through reducing lubricant viscosity. Some of you may be thinking, "Wait a minute, Dan, you just said that motor oils depend on a thin film of oil to reduce metal-to-metal friction and now you are saying that motor oils need to be thinner to reduce fluid friction. Have you been smelling solvents in the lab too long?"

Well, I have spent a lot of time in the lab over my career, but hopefully have a few brain cells left to tide me over to retirement. Reducing fluid friction depends on reducing the lubricant's resistance to flow. For a given lubricant design, the higher the viscosity, the more energy it takes for engine parts to move and for the oil to be pumped around the system. But there is a limit to how low you can go without allowing metal-to-metal friction. For those, like me, who grew up using 10W-40 in our vehicles the idea of yet another lower viscosity motor oil category is a little scary. This idea of reducing fluid friction to improve fuel economy can't go below a 0W-20 right? Well, enter SAE 16.

This evolution is continuing with the approval and introduction of the new API SAE 16 category. This is a lighter viscosity compared to the 20-weight category and, of course, all of this work is supporting the improvement in fuel economy outlined in new U.S. Corporate Average Fuel Economy (CAFE) standards.

Development of this new category was done by making the SAE 20 category tighter. Now the new SAE 16 viscosity category covers what used to be the bottom end of the SAE 20 category where no commercial motor oils were ever designed. This lower viscosity category improves fuel economy further for engines designed for this lubricant. It reduces the fluid friction, and engines run more economically as a result. This motor oil is thinner and does not depend as much on the thin layer of oil for proper protection; rather, oil additives play a bigger role in overall engine protection. This does not mean that base oils are less important in overall protection; it is actually the opposite - outstanding base-oil lubricity is even more important than before because the thin film of oil at operating temperature just got thinner. What it also means is that high-tech motor oil additives are becoming an even more important part of engine protection than ever before.

These thinner motor oils will be covered by a new specification with the next round of gasoline motor oil specifications, which will be separated into two categories: GF-6A and GF-6B. The first category, GF-6A, will be focused on protection for gasoline direct-injection (GDI) engines, which will be the predominant engine platform moving forward and will be backward compatible to older engines. GF-6B, on the other hand, will not be backward compatible and will only cover the new SAE XW-16 category. These lubricants will be required for vehicle manufacturers to help meet the stringent CAFE requirements for new vehicles.

The engine protection requirements will be the same as those outlined in GF-6A, but GF-6B will use a different formulation to achieve these goals because of the ultra-low viscosity requirement.

Just when I was getting used to the idea of putting 5W-20 in my 2010 Ford Fusion, now I have to get my head around the potential of XW-16 for a Honda Civic. When I was younger, I had a boss who had big brass boots on his desk inscribed with the words, "Don't bring me your problems, bring me your solutions." New problems almost always create opportunities for new and innovative solutions. In this case, you can be sure that AMSOIL will move quickly from the problem to the solution. Published, AMSOIL Magazine 09/14.

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.



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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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