A Decade of AMSOIL Ultimate Callout Challenge

Celebrating its 10th anniversary in 2026, the AMSOIL Ultimate Callout Challenge (UCC) is a cornerstone of the diesel performance industry. From its inception, the UCC has been a proving ground for innovation, engineering and sheer determination, bringing together the best builders, drivers and enthusiasts to push the limits of diesel power.

A Decade of Diesel Excellence

The UCC is an annual competition that tests diesel trucks across three grueling disciplines—dyno, drag racing and sled pulling. Over the last decade, it has grown into the premier event for diesel performance, attracting top-tier competitors and thousands of fans. The UCC has become synonymous with cutting-edge engine technology and jaw-dropping feats of engineering, making it the perfect place to promote AMSOIL.

Team AMSOIL racer and builder Ken Bruner is a well-known name in the UCC ranks. His 2024 victory, with a 5.29-second drag run and a 317.81-foot sled pull, is a highlight in the event’s storied history. Exemplifying the innovative spirit of the competition, this year he built a 6.8L deck-plated Cummins* engine in collaboration with Freedom Racing Engines and Fleece Performance. Bruner’s meticulous approach showcases the level of engineering expertise that the UCC demands.

Pushing the Limits

Team AMSOIL builder Greg Alberalla also embodies the passion and dedication that fuel this industry. Alberalla’s story of perseverance and innovation includes building a daily-driver Dodge* Ram* into a record-breaking 3,337-horsepower monster that stunned the diesel world.

Similarly, AMSOIL partners like Banks Power, Freedom Racing Engines, Fleece Performance and JH Diesel & 4×4 play pivotal roles in pushing the limits of turbodiesel engines. With a focus on custom builds and high-quality craftsmanship, these shops are core destinations for enthusiasts looking to take their trucks to the next level. It is a commitment to excellence that mirrors the ethos of AMSOIL and the UCC.

Impact on the Industry

Over the past decade, UCC has driven significant advancements in diesel technology, spurring innovation in engine design, fueling systems and drivetrain components. But it’s also about community and collaboration, fostering camaraderie among competitors, who share knowledge and techniques that elevate the entire industry.

The UCC influence also extends beyond the track, inspiring a new generation of enthusiasts, drawn to the spectacle of extreme-horsepower trucks and the challenge of pushing mechanical limits. It is changing perceptions of diesel vehicles by showcasing their untapped potential. Unsurprisingly, setting new benchmarks for engine performance and reliability are also hallmarks of AMSOIL products, making it a perfect paring.

As the AMSOIL Ultimate Callout Challenge enters its second decade, the event continues to attract top talent and cutting-edge technology, ensuring it remains at the top of the diesel performance industry. It’s a reminder of what can be achieved when passion and innovation push the limits to redefine performance.

How to Watch UCC

To catch all the action, order your 2026 AMSOIL Ultimate Callout Challenge tickets and head over to Indianapolis Raceway Park on June 5–7, or follow AMSOIL on social media for all the latest racing news.