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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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Stored Equipment Requires Preparation to Ensure Its Protected

Rust, corrosion and degraded fuel can attack unprepared equipment in storage.

Dan Peterson, Vice President, AMSOIL Technical Development

Len Groom
Technical Product Manager,

With winter approaching, many of you will be putting equipment such as motorcycles, lawnmowers and personal watercraft into storage. Though it can be tempting to park it out of sight after the final use and hope it starts again next season, such action (or inaction) can have serious consequences. Engines left unprepared for storage can suffer from fuel degradation, condensation and corrosion. The results can lead to poor performance, costly repairs or replacement, so it makes sense (and cents) to prepare equipment for the off-season so its protected and ready for springtime use. Even if you live in a moderate winter climate, extended periods of non-use warrant following these winterizing strategies.


1) Wash and dry - Road contaminants can permanently stain and corrode paint and chrome.

2) Change oil - Combustion and its by-products cause oxidation, which can be detrimental to internal engine components. Fresh oil protects engines against such unseen damage.

3) Stabilize fuel - Gasoline can begin to degrade in as little as 30 days, forming gums and deposits on engine components. Treating it with AMSOIL Gasoline Stabilizer can prevent degradation and carburetor and injector problems.

4) Remove battery - If storing for an extended period, remove the battery or connect a float charger to keep it at full capacity without risk of damage from overcharging.

5) Lift off ground - Use a stand or ramp to prevent flat spots.

6) Cover - Cover the motorcycle to protect it from light and dirt.

Outboard Engines (Two- and Four-Stroke)

1) Stabilize fuel with AMSOIL Gasoline Stabilizer after the final use if storing four months or longer.

Quickshot provides fuel stabilization for periods less than four months. No Gasoline Stabilizer is required if you've been using Quickshot and the engine will be stored fewer than four months

2) Change lower unit oil - If any water has invaded the lower unit over the summer and it's left there during storage, rust can form on bearings and the lower unit gears can degrade.

3) Change oil and filter (in four-stroke engines) - Most four-stroke engines use a separate spin-on filter. Change the oil and filter for protection against oxidation, rust and corrosion acids from combustion.

4) Fog engine - AMSOIL Engine Fogging Oil gives engine components an extra protective barrier against condensation and dry starts.

Personal Watercraft (PWC)

1) Stabilize fuel during last use with AMSOIL Quickshot or Gasoline Stabilizer.

2) Wash and dry equipment.

3) Flush with storage antifreeze if the PWC is stored in subfreezing temperatures.

4) Flush with freshwater if the PWC is used in saltwater.

5) Fog engine with AMSOIL Engine Fogging Oil (if applicable).

6) Remove battery and store it off the ground in a warm, dry place.

7) Leave the seat open slightly, cover the PWC and store indoors (preferably).

8) If storing outside, cover the PWC but not so tightly that it restricts air flow.

Lawn, Garden and Handheld Equipment

1) Stabilize fuel with AMSOIL Gasoline Stabilizer or AMSOIL Quickshot.

2) Change oil and filter (on four-stroke engines) at least once a year.

3) Fog engine with AMSOIL Engine Fogging Oil (if applicable) - This is a good idea for four-stroke engines, too, but fogging is a must for two-stroke engines if they are being stored for 30 days or more.

4) Wash off grass, dirt, wood chips, etc.

5) Apply AMSOIL MP Metal Protector to exposed metal parts to prevent rust.

6) Equipment is best stored indoors. If left outside, protect it with a cover.

Following these simple steps can keep your equipment in peak operating condition, even when it's not in use for several months. An hour or two of preventive maintenance now means next spring you'll be spending more time on the road, on the water or in the yard instead of in the shed tearing apart dirty carburetors. Published, AMSOIL Magazine 10/13.

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.



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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