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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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Fuel System Maintenance Is Essential For Modern Engines

Without regular cleaning, today's engines will not deliver the power and fuel economy they are designed to deliver.

Dan Peterson, Vice President, AMSOIL Technical Development

Matt Erickson
Technical Product Manager,
Passenger Car

It used to be common practice for vehicle owners to spend a Saturday afternoon in the garage, giving their vehicles a tune-up. There was a sense of pride and accomplishment in working under the hood, getting their hands dirty and knowing the efforts would help keep the car or truck running strong. Back then, vehicles were much easier to work on - the engine layouts were open, components were accessible and the average Joe didn't need advanced training or complicated tools to perform maintenance.

Today's vehicles are a different breed. The push for better fuel economy has led to smaller engines littered with computerized monitoring systems and complex technologies all tightly packaged together. As a result, most of us are taking our vehicles to repair shops for even the most routine maintenance. Yet all vehicle owners can still perform a quick engine "tune-up" with no tools or automotive background required. Instead of turning wrenches, it comes in the form of a fuel additive.

As you know, motor oils are tasked with several functions beyond just lubricating, including keeping engine components clean. This is made possible by the use of detergent and dispersant additives. Their role is to prevent contaminants from sticking to engine components, especially hot components such as pistons and rings. However, motor oil is not able to prevent deposit build-up on certain components, including fuel injectors, intake valves and combustion chambers. That's where boosting the cleaning power of gasoline comes into play.

Fuel injectors are traditionally located in the air intake ports, and they spray fuel in a fine mist that mixes with air as it passes by the backs of the intake valves. Fuel injectors of this style are appropriately called port fuel injectors. Port fuel injectors become clogged with deposits over time, which causes that fine mist of fuel to turn into an unpredictable stream of fuel. As a result, the fuel doesn't mix as well with the air, and the combustion of the mixture is less effective.

Now consider a gasoline direct-inject engine such as the Ford EcoBoost or GM Ecotec, which have fuel injectors positioned with the tip located inside the combustion chamber. Because of this location advantage, they can better control the spray of finely atomized fuel into the cylinders, leading to increased power, reduced emissions and most importantly these days, improved fuel economy. During normal engine operation these injectors are exposed to much higher temperatures and pressures, which leads to more rapid deposit build-up than the build-up on traditional port fuel injectors. The outcome of plugged injectors is the same - poor spray patterns causing lost power and efficiency.

In a port fuel-injected engine, the next components that can be reached through the fuel system are the intake valves. Their job is to allow air into the combustion chamber at the precise time that it is needed, then close tightly to seal the chamber during combustion. The valves tend to accumulate deposits over time that can prevent them from sealing properly, allowing pressure loss and poor engine performance. Since the port fuel injectors are positioned to spray at the valves, any deposits that form on them can be easily addressed through fuel additives. However, in direct-inject engines the intake valves never get fuel sprayed on them, so fuel additives have a minimal effect on cleaning those deposits.

The final components that see a significant benefit from fuel additives are the components that form the combustion chamber itself: the piston, cylinder walls and head. The extreme temperatures and pressures they are routinely exposed to make them prone to deposit formation. These deposits can lead to hot spots that cause the air-fuel mixture to ignite before it should, resulting in uncontrolled combustion known as engine knock. Today's engines have sensors to detect that condition, and they constantly make adjustments to compensate. The good news is that those adjustments prevent the knock from causing significant engine damage. The bad news is that the engine is no longer operating at its most efficient settings, leading to lost power and fuel economy.

This is where quality fuel additives make a difference. Their role is to clean the deposits that the motor oil cannot reach. AMSOIL P.i. Performance Improver (API) is a highly concentrated formulation specifically designed to clean all of the deposits previously mentioned. The result is restoring and maintaining engine performance. The proof-of-performance study titled "AMSOIL P.i.: A Study in Performance" (G2543) is a great tool for demonstrating P.i.'s effectiveness. It is located in the Performance Tests Section and details the results of validation testing of P.i., including the 5.7 percent gain in fuel economy after running just one tank of P.i.-treated gas. No wrench-turning required. Published, AMSOIL Magazine 11/14.

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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