Bill Rigdon

Your investment deserves a diesel oil that’s up to the challenge.

Your investment deserves AMSOIL.

Protection Boosted to the Max

You’re not tooling around town in a short-box whose heaviest load was that one time you went too far at the local wholesale club – you’re in a diesel. It’s raw power and whether you’re impressing your buddies or towing the work trailer, you need every ft.-lb. of torque. Pushing your pickup to perform might be a natural side-effect of sitting in the driver’s seat, but it also puts a lot of stress on your engine. And let’s face it – they aren’t giving these things away. Your investment deserves a diesel oil that’s up to the challenge. Your investment deserves AMSOIL.

More Built-In Diesel Engine Protection

Excessive wear to diesel cylinder liners and rings leads to increased oil consumption and loss of compression, reducing horsepower and fuel economy.

Independent testing shows AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides 6X more wear protection than required by the standard*. In the same test, AMSOIL Heavy-Duty Synthetic Diesel Oil delivers 4X more protection against wear than required by Detroit Diesel’s standard*.

Detroit Diesel, a leader in diesel engine technology, sets a standard for measuring cylinder liner and ring wear with its DD13 Scuffing Test for the DFS 93K222 specification. Testing of AMSOIL synthetic diesel oils was conducted by an independent lab in accordance with the following parameters:

The test simulates real-world use with a modified Detroit Diesel DD13 diesel engine running for 200 hours. Cylinder liner scuffing and top ring wear are measured and used oil analysis is performed to determine wear levels during the test.

With our top-grade synthetic diesel oils under your hood, you can be confident that there’s more than enough protection to handle the demands of your performance modifications and keep your diesel running strong in the most severe conditions.

AMSOIL Synthetic Diesel Products

Signature Series Max-Duty Synthetic Diesel Oil 15W-40

Signature Series Max-Duty Synthetic Diesel Oil 5W-40

Signature Series Max-Duty Synthetic Diesel Oil 0W-40

Signature Series Max-Duty Synthetic Diesel Oil 5W-30

AMSOIL Warranty

AMSOIL guarantees the performance of its products, so you can be confident they perform as advertised. AMSOIL introduced the world’s first API-qualified synthetic motor oil and has since introduced a full line of industry firsts. For more than 40 years, AMSOIL synthetic lubricants have proven themselves in the lab, on the racetrack and on the highway.

Testimonials

AMSOIL Two-Million Mile Truck Story

In October 2012, AMSOIL told the story of Jerry Pruett’s one-million-mile-plus Kenworth. The Woodhull, Ill., native installed AMSOIL synthetic lubricants when he bought the truck new in 1999. After reaching 1.6 million miles on the original transmission and differentials and 1.1 million miles on the factory-rebuilt engine in 2012, Pruett has since eclipsed 2 million miles and shows no signs of slowing down.

The truck, which Pruett uses to haul freight predominantly around the Midwest, has required little maintenance since 2012. In November of that year, Pruett did finally need to replace the fuel injectors. “The spray pattern on the pistons was still good,” he said. “The springs must have weakened over time. Other than that, there was nothing wrong with them.” All six injectors lasted 1.1 million miles. Injectors typically require replacement prior to 500,000 miles, says Pruett. Pruett attributes their longevity to continuous use of AMSOIL Diesel Injector Clean.