Dealers Needed

Buy AMSOIL at Wholesale Prices
Become A Preferred Customer

Frequently Asked Questions

Satisfied Customers

Motorcycle Products

Motorcycle Oils

Motorcycle Air/Oil Filters

Motorcycle Suspension Fluids

Motor Oils

Racing Motor Oils

Diesel Oils

Oil Filters

Air Filters

2-Cycle Oils

4-Stroke Oils

Gear Lubricants

Racing Gear Lubricants

Transmission Fluids

Fuel Additives

Brake Fluid

Power Steering Fluid


Hydraulic Oils

Compressor Oils

Wiper Blades

Spark Plugs/Wire Sets




Industrial Products

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?


To order a free catalog | Click here |

To buy AMSOIL products, visit the AMSOIL Online Store

| Buy AMSOIL at wholesale prices |

Buy AMSOIL By Phone from AMSOIL Headquarters
7am-5pm Central Time, Toll-Free at: 1-800-777-7094

Give Operator Sponsor # 504006
For Fastest Service

Buy AMSOIL at Wholesale Prices AMSOIL Synthetic Gasonline Motor Oils AMSOIL Synthetic Diesel Motor Oils
AMSOIL Synthetic European Motor Oils AMSOIL Synthetic Racing Motor Oils AMSOIL Synthetic Motorcycle Motor Oils
AMSOIL Synthetic 2-Stroke Motor Oils AMSOIL Synthetic 4-Stroke Motor Oils AMSOIL Synthetic Tansmission Fluids
AMSOIL Synthetic Gear Lubes AMSOIL Synthetic Greases AMSOIL Synthetic Hydraulic Oils
AMSOIL Synthetic Compressor Oils AMSOIL Gasoline Fuel Additives AMSOIL Diesel Fuel Additives
AMSOIL Filtration Products AMSOIL Other Products Buy AMSOIL at Wholesale Prices

Which AMSOIL Products Are Recommended For Your Vehicles?

| Click Here And Enter Your Vehicle Information To Find Out |

AMSOIL Oil Service Life Can Be Determined In Various Ways

AMSOIL Signature Series Motor Oil New 700-Hour Limit Provides Clarity for Those Operating Vehicles That Idle Excessively.

Dan Peterson, Vice President, AMSOIL Technical Development

Dan Peterson
Vice President,
Technical Development

Oftentimes we talk about how long motor oil can be used - the expected service life - before it needs to be changed. Service life is most frequently described in miles and can be greatly affected by a vehicle's operating conditions, which is why AMSOIL has provided definitions for normal and severe service.

For our Signature Series products, AMSOIL defines severe service as primarily short trips (less than 10 miles [16 km]); turbo/supercharged engines; commercial or fleet vehicles; excessive idling; first-time use of AMSOIL motor oil in a vehicle with more than 100,000 miles; frequent towing, hauling, plowing, or driving in dusty conditions. Most of those conditions are straightforward. "Excessive idling," however, can be difficult to define. To add clarity, AMSOIL is now adding a 700-hour interval under both normal and severe service conditions.

Matt Erickson, our Technical Product Manager, Passenger Car, created the graph below to help illustrate the importance of the hours interval by highlighting some examples. The graph shows the hours of engine operation, or idle time, versus the miles driven for a drain interval. The colored lines represent average speeds of a vehicle in four different scenarios. The blue line represents an average speed for a New York City taxi, which according to the EPA is only 7.1 mph. Even though the taxis there don't move very fast, their engines are operating nearly continuously, which means that the oil is being stressed for a large amount of time. If you follow the blue line in the graph, you can see that after 700 hours they have only traveled 5,000 miles. And according to the updated AMSOIL recommendation, these cabs should change their oil unless oil analysis says they can go longer.

During testing, we found that taxis running in Las Vegas average a consistent 14.6 mph. Even though the vehicles are not always moving, the engines stay on just to keep the air conditioners running. Following the orange line in the graph shows that these vehicles can accumulate a little more than 10,000 miles in 700 hours. That's the same amount of time as the NYC taxi, but they can go twice as long in terms of miles. This is a clear example of how the hours interval can significantly impact the amount of miles achieved in a drain interval.

The EPA city driving cycle is used to estimate the city fuel economy numbers we are familiar with seeing advertised on vehicles. It has an average speed of 21.2 mph, and it is a good representation of short-trip or stop-and-go driving seen in cities without major congestion. Vehicles primarily used in this capacity fall into severe service, so the mileage cutoff would be at 15,000 before the next oil change, which happens to correspond nicely with the 700-hour mark. Now if speeds are slightly above 21.2 mph, but the driving conditions fall into severe service (turbocharged, dusty, towing, plowing, etc.), then the drain interval will be limited by 15,000 miles before it reaches 700 hours.

Finally, the EPA highway cycle is shown in green, averaging 48.3 mph. This is mostly highway driving, and even after 25,000 miles the engine operating time is only slightly over 500 hours. Therefore, drain intervals will be set by 25,000 miles, and the hours don't even come into play.

AMSOIL Signature Series Motor Oil represents the pinnacle of oil formulation, but all motor oils eventually break down. For many applications, especially personal-use vehicles, the average speed is high enough that the hours of engine operation are not a concern. However, for high idle-time applications, such as those common to fleets, logging the amount of time the engine operates is important. Published, AMSOIL Magazine 02/15.

AMSOIL Signature Series Oil 700-Hour Graph

AMSOIL Signature Series Motor Oil New 700-Hour Limit Provides Clarity for Those Operating Vehicles That Idle Excessively.

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.



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.

AMSOIL Product Information

Use This Form to Get Exclusive Technical Articles and Information on AMSOIL Products.

Receive valuable weekly newsletter by email - please complete this form.

Personal contact information will only be used to provide requested information or assistance. You will not be enrolled in advertising or marketing programs and your information will not be sold.

You will only receive the email newsletter.

Which AMSOIL Products Are Recommended For Your Car or Truck?
| Click Here And Enter Your Vehicle Information To Find Out |

What Drain Interval Does AMSOIL Recommended For Your Vehicle?
| Click Here For The AMSOIL Recommended Drain Interval Chart |

I welcome the opportunity to work with you personally as your servicing AMSOIL Dealer. Use the information on this website to contact me. You may also check out the AMSOIL Corporate Website for product and business opportunity information.

If you would like more information about AMSOIL INC., click one of the links below: