AMSOIL and Fleece Performance Engineering Introduce Co-Developed Freedom Series Diesel Lubricants

Motortopia Staff . March 25, 2026 . Press Release

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SUPERIOR, Wis. – AMSOIL and Fleece Performance Engineering today announced the launch of Freedom Series, a jointly developed line of premium diesel lubricants engineered through a close, technical partnership between the two companies. By combining AMSOIL’s leadership in synthetic lubrication with Fleece’s deep expertise in high-performance diesel engineering, the Freedom Series delivers a new standard of protection and performance for turbodiesel pickups — from daily drivers to high-output builds and racing applications.

The Freedom Series lineup includes 10W-30, 5W-40 and 15W-40 100% Synthetic Diesel Oil; 15W-50 100% Synthetic Racing Oil; and SAE 30 Break-In Oil. Each product was co-designed through an iterative development process that merged AMSOIL formulation science with real-world insights and demands from Fleece’s performance and racing programs.

“Every product in this series reflects the strengths of both organizations,” said Ryan Radzak, AMSOIL Product Marketing Manager. “Our teams worked side-by-side to engineer lubricants that meet the extreme heat, heavy loads and elevated stress found across today’s modern, modified and high-performance diesel platforms. Freedom Series represents what’s possible when two industry leaders collaborate with a shared vision for innovation.”

Freedom Series Diesel Oil features AMSOIL synthetic base oils and advanced additive chemistry, enhanced through testing and validation with Fleece Performance Engineering to deliver superior wear protection, improved oxidation resistance and reliable thermal stability. The SAE 30 Break-In Oil was specifically formulated and fine-tuned to support proper ring seating and component conditioning in newly built performance engines and is included with all Fleece Performance Freedom Series long blocks.

“Partnering with AMSOIL allowed us to influence the lubricant design at a molecular level for the first time,” said Jeff Everett, Fleece Performance Engineering’s VP of Sales. “Freedom Series gives diesel enthusiasts and engine builders products that were created through real collaboration from industry leaders — products that are engineered perform”

AMSOIL Freedom Series is now available in the United States through AMSOIL.com, independent AMSOIL Dealers and participating Fleece distribution partners as well as FleecePerformance.com. The line is not currently available in Canada.

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