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Protecting Against LSPI – Even During Extended Drain Intervals

Signature Series 100% Synthetic Motor Oil far exceeds industry standards for protection against LSPI.

September 30, 2026

How AMSOIL Gives Back: Training Technicians, Drivers and K-9 Teams

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AMSOIL HQ

How AMSOIL Gives Back: Training Technicians, Drivers and K-9 Teams

AMSOIL supports the people who keep machines running and communities safe, including the Motorcycle Mechanic’s Institute, Team O’Neil Rally School…

September 29, 2026

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No Sludge. Just Protection.

Signature Series 100% Synthetic Motor Oil resists breakdown.

September 22, 2026

Editor’s Picks

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Turn More Heads with AMSOIL Car Care

AMSOIL car-care products are engineered with advanced technology to deliver powerful cleaning action that helps vehicles shine brighter.

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Your Ultimate Oil Change

Right product. Right package. Right to your door.

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Which AMSOIL Motor Oil Is Right for You? A Comparison

No matter what you drive or how you drive, AMSOIL provides specially formulated motor oil designed to protect your vehicle.

9 Motor Oil and Car Maintenance Myths, Busted

Motor oil myths abound. Here are nine of the most persistent along with our myth-busting facts.

Synthetic vs. Conventional Oil: The Differences That Matter

Find out everything you need to know about synthetic vs. conventional motor oil.

5W-20 vs 5W-30 vs 10W-30: What’s the Difference?

The primary differences are their viscosities when cold and once your engine has reached operating temperature.

Transmission Flush vs Fluid Change: Which is Better?

Is a flush or pan drop better when changing transmission fluid? Learn the pros and cons of each method.

How To

How to Check Power Steering Fluid (and When to Change it)

There are a couple ways to change power steering fluid, depending on your technical know-how.

How to Clean Fuel Injectors: Gas and Diesel

Using proven AMSOIL fuel additives can save you money on expensive maintenance.

Featured

News

Turn More Heads with AMSOIL Car Care

AMSOIL car-care products are engineered with advanced technology to deliver powerful cleaning action that helps vehicles shine brighter.

June 3, 2025

News

Your Ultimate Oil Change

Right product. Right package. Right to your door.

November 1, 2024

News

Which AMSOIL Motor Oil Is Right for You? A Comparison

No matter what you drive or how you drive, AMSOIL provides specially formulated motor oil designed to protect your vehicle.

December 11, 2023

How To

Understanding Oil Viscosity

Viscosity is the measure of a fluid’s resistance to flow.

January 17, 2023

SYNTHETIC VS. CONVENTIONAL

Although you might know that synthetic oils outperform conventional oils, you might not understand why. The differences begin at the molecular level.

Learn More

Latest News

News

Protecting Against LSPI – Even During Extended Drain Intervals

Signature Series 100% Synthetic Motor Oil far exceeds industry standards for protection against LSPI.

September 30, 2026

News

AMSOIL HQ

How AMSOIL Gives Back: Training Technicians, Drivers and K-9 Teams

AMSOIL supports the people who keep machines running and communities safe, including the Motorcycle Mechanic’s Institute, Team O’Neil Rally School…

September 29, 2026

News

No Sludge. Just Protection.

Signature Series 100% Synthetic Motor Oil resists breakdown.

September 22, 2026

News

Clean and Powerful Pistons: Signature Series and the Sequence IIIH Test

Results in the test are a good indicator of how well an oil will perform in the real world.

September 22, 2026

News

Hold On to Your Power

Signature Series maintained horsepower and torque throughout a 125,000-mile test, even under the elevated stresses of a high-output 3.5L engine.

September 18, 2026

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Latest Videos

Boat Maintenance Checklist: Engine and Lower Unit Tips

Avoid expensive boat repairs with this quick marine engine maintenance checklist.

August 5, 2026

Latest Events

How To

Riding to Sturgis? Try These Tips.

These practices can help make your adventure to Sturgis Motorcycle Rally more enjoyable.

July 16, 2026

More Events

Latest Testimonials

Sportsman Spotlight: Bailey Broderick — A Day on the Rubicon

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Sponsorships

Sportsman Spotlight: Bailey Broderick — A Day on the Rubicon

At just 22-years old, Bailey Broderick conquered the iconic off-road trail in a singular day.

September 2, 2026

Sportsman Spotlight: John & Krista Long

A racing program rooted in hard-earned experience, mechanical self-sufficiency and the relentless pursuit of performance.

April 29, 2026

More Testimonials

Product Support

Customer Service

Latest

Protecting Against LSPI – Even During Extended Drain Intervals

How AMSOIL Gives Back: Training Technicians, Drivers and K-9 Teams

No Sludge. Just Protection.

Editor’s Picks

Turn More Heads with AMSOIL Car Care

Your Ultimate Oil Change

Which AMSOIL Motor Oil Is Right for You? A Comparison

9 Motor Oil and Car Maintenance Myths, Busted

Synthetic vs. Conventional Oil: The Differences That Matter

5W-20 vs 5W-30 vs 10W-30: What’s the Difference?

Transmission Flush vs Fluid Change: Which is Better?

How to Check Power Steering Fluid (and When to Change it)

How to Clean Fuel Injectors: Gas and Diesel

Featured

Turn More Heads with AMSOIL Car Care

Your Ultimate Oil Change

Which AMSOIL Motor Oil Is Right for You? A Comparison

Understanding Oil Viscosity

SYNTHETIC VS. CONVENTIONAL

Latest News

Protecting Against LSPI – Even During Extended Drain Intervals

How AMSOIL Gives Back: Training Technicians, Drivers and K-9 Teams

No Sludge. Just Protection.

Clean and Powerful Pistons: Signature Series and the Sequence IIIH Test

Hold On to Your Power

Latest Videos

Boat Maintenance Checklist: Engine and Lower Unit Tips

Latest Events

Riding to Sturgis? Try These Tips.

Latest Testimonials

Sportsman Spotlight: Bailey Broderick — A Day on the Rubicon

Sportsman Spotlight: John & Krista Long

SYNTHETIC VS. CONVENTIONAL

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