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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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Direct Injection Brings Diesel Technology to Gasoline Engines

AMSOIL GDI Technology Offers Improved Power And Efficiency, Along With A New Set Of Challenges For Motor Oil.

Dan Peterson, Vice President, AMSOIL Technical Development

Matt Erickson
Technical Product Manager,
Passenger Car

Fuel economy and performance are probably the two most emphasized features of vehicles today. Even powerful pickup trucks are touting their respective MPGs alongside horsepower in an appeal to both the macho and penny-pinching sides of prospective truck buyers. Better fuel economy and better performance - is it possible to have both?

The answer is, "yes," with Corporate Average Fuel Economy (CAFE) standards driving the need, and gasoline direct injection (GDI) technology as a leading solution.

Automakers are being pressured by the federal government's CAFE mandates to produce vehicles that meet higher fuel economy standards and decrease emissions. In October 2012, the National Highway Traffic Safety Administration and Environmental Protection Agency released final standards regulating CAFE and greenhouse gas emissions for light-duty vehicles (passenger cars and trucks) manufactured in model years 2017 through 2025. This legislation projects average required fleet-wide fuel economy ranging from 40.3 to 41.0 mpg in model year 2021 and from 48.7 to 49.7 mpg in model year 2025. The 2025 "split" estimates the average required car mpg from 55.3 to 56.2 mpg and light trucks from 39.3 to 40.3 mpg.

One promising source for better fuel economy and performance is seen in the resurgence of GDI engines. The major difference between GDIs and conventional port-injected engines is how and where the gasoline is introduced prior to combustion. In conventional port-injected fuel systems, the fuel/air mixture occurs in the intake manifold; in GDI engines, gasoline is injected directly into the combustion chamber under very high pressures. Like similarly injected diesel engines, this results in greater power, torque and operating efficiency. Because of the specialized fuel delivery components required for gasoline direct injection, GDI engines remain more expensive to build than port-injected systems. Even so, most major car manufacturers are now, or soon will be, producing vehicles employing GDI technology. IHS Automotive, a global industry forecasting company, predicts North American GDI engine installation to rise from approximately 3 million units in 2012 to more than 8 million units by 2016. There are several reasons for the increasing production:

1. Today's injector systems are computer-controlled and capable of delivering extremely accurate and rapid distribution of atomized gasoline. The fuel can be sprayed directly at the hottest part of the combustion chamber, which is near the spark, improving efficiency. Standard gasoline engines end up with the fuel-air mixture widely dispersed in the chamber, resulting in less efficient operation.

2. Because fuel in GDI engines is injected directly into the cylinder instead of the intake port, as in traditional gasoline engines, it remains cooler and can be compressed more densely to produce greater power.

3. Since the fuel supply is more precisely controlled, combustion can occur at leaner air-to-fuel ratios. GDI engines use a mixture of 40 parts (or more) air to one part fuel during light loading, while traditional gasoline engines use a mixture of 14.7 parts air to one part fuel. The 40:1 ratio means less fuel is burned during combustion, resulting in better fuel economy.

4. When atomized fuel is injected into cyl-inders at high pressure, the combustion chamber temperature decreases. This temporary in-cylinder cooling increases the efficiency of the air-fuel mixture charge.

GDI engines also work well with turbo-chargers, and by combining the two tech¬nologies automakers can build smaller-displacement engines with performance specs comparable to - or better than - larger engines.

GDI engines are not faultless, however. Because fuel is injected directly into the combustion chamber, intake valves don't get "washed" with gasoline as they do in port-injected engines. This can result in carbon build-up. To fight these deposits, GDI engines rely primarily on injection timing calibration and exhaust gas recirculation (EGR), allowing combustion gases to "wash" the intake valves. These technologies have limitations though, and can come up short. Because they are located in the combustion chamber, the fuel injectors are also exposed to greater temperatures and pressures. This environment makes them more susceptible to deposits that impede the spray pattern, reducing engine efficiency.

In addition to using high-quality gas, regular use of robust fuel additives is a good practice for keeping fuel systems clean. AMSOIL P.i. Performance Improver Gasoline Additive (API) contains powerful detergents that clean deposits that can form in combustion chambers and on fuel injectors. By doing so, P.i. improves fuel economy and reduces emissions. P.i. is the top choice to keep GDI and port-fuel-injected engines deposit-free and running at peak efficiency.

GDI technology is a major component of achieving both better fuel economy and increased performance. How far the technology goes is yet to be determined. Meanwhile, AMSOIL P.i. Performance Improver gasoline additive makes it easy to help keep engines clean and operating at peak performance. Published, AMSOIL Magazine 2/13.

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).

Click here for more information

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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