Uncompromised Reliability for Marine Tenders, Commercial Fleets & Seasonal Assets

Aspen 4 is a high-octane, pure alkylate fuel engineered strictly for four-stroke engines. 

Built for demanding environments, it is the professional standard for powering lightweight marine outboards, yacht tenders, commercial small-engine fleets, and critical standby gear.

Where separate oil and fuel systems are utilized, Aspen 4 delivers maximum power, absolute fuel stability, and peak mechanical efficiency while aggressively protecting your high-value assets.