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Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson clinched his first AMSOIL Championship Off-Road Pro 4 title at Glen Helen with patience, and a late pass.

October 7, 2026

Why Fuel Deteriorates – and How Gasoline Stabilizer Has Your Back

News

Why Fuel Deteriorates – and How Gasoline Stabilizer Has Your Back

October 5, 2026

CORR Presented by AMSOIL: The Future of Desert Short-Course Racing

CORR Presented by AMSOIL: The Future of Desert Short-Course Racing

AMSOIL is the presenting sponsor of CORR, the USAC-sanctioned Pro-Am UTV short-course series racing across Arizona, California and Nevada.

October 2, 2026

Editor’s Picks

Turn More Heads with AMSOIL Car Care

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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.

Your Ultimate Oil Change

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Your Ultimate Oil Change

Right product. Right package. Right to your door.

Which AMSOIL Motor Oil Is Right for You?

News

Which AMSOIL Motor Oil Is Right for You?

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

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

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?

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?

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.

Power Steering Fluid: How to Check It and When to Change It

How To

Power Steering Fluid: How to Check It 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

How to Clean Fuel Injectors: Gas and Diesel

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

Featured

Turn More Heads with AMSOIL Car Care

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

Your Ultimate Oil Change

News

Your Ultimate Oil Change

Right product. Right package. Right to your door.

November 1, 2024

Which AMSOIL Motor Oil Is Right for You?

News

Which AMSOIL Motor Oil Is Right for You?

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

December 11, 2023

Understanding Oil Viscosity

How To

Understanding Oil Viscosity

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

January 17, 2023

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Find the Right AMSOIL Products

Get the right products for your vehicles
Cars, trucks and motorcycles
Recreational, vintage and commercial
Oil filter lookup and cross-reference

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Front end of a yellow Ford GT parked on grass

Latest News

Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson clinched his first AMSOIL Championship Off-Road Pro 4 title at Glen Helen with patience, and a late pass.

October 7, 2026

Why Fuel Deteriorates – and How Gasoline Stabilizer Has Your Back

News

Why Fuel Deteriorates – and How Gasoline Stabilizer Has Your Back

October 5, 2026

Protecting Against LSPI – Even During Extended Drain Intervals

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

No Sludge. Just Protection.

News

No Sludge. Just Protection.

Signature Series 100% Synthetic Motor Oil resists breakdown.

September 22, 2026

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

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

Latest Videos

Boat Maintenance Checklist: Engine and Lower Unit Tips

Boat Maintenance Checklist: Engine and Lower Unit Tips

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

August 5, 2026

Latest Events

Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson Wins His First Pro 4 Championship

Jimmy Henderson clinched his first AMSOIL Championship Off-Road Pro 4 title at Glen Helen with patience, and a late pass.

October 7, 2026

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: The Racers and Riders Who Run AMSOIL

News

Sponsorships

Sportsman Spotlight: The Racers and Riders Who Run AMSOIL

Meet the racers, riders and outdoor enthusiasts who partner with AMSOIL, and find out why they trust AMSOIL synthetic lubricants.

September 1, 2026

More Testimonials

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