MAMMOTH PETROLEUM
778-370-3330
Aspen 4
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.
The Professional Advantage of Aspen 4
Ultimate Marine Protection: Standard ethanol-blended pump gas rapidly absorbs moisture in high-humidity marine environments, leading to phase separation, clogged filters, and severe internal corrosion. Aspen 4 is 100% ethanol-free, keeping fuel systems pristine and preventing the internal rot that sidelines marine tenders and outboards.
The Ultimate End-of-Season Storage Solution: Stop relying on temporary fuel stabilizers that still let fuel degrade. Running Aspen 4 through your equipment at the end of the season guarantees a clean layout for winterization. Because it lasts up to 10 times longer than pump gas and contains zero benzene, it prevents the varnished carburetors and gummed-up lines that cause spring starting failures—saving hundreds of dollars in expensive fuel system repairs at the start of the next season.
Peak Efficiency, Zero Power Loss: The ultra-clean formula significantly reduces carbon build-up and combustion deposits. Engines run cooler, idle smoother, and maintain maximum power output under sustained, heavy workloads.
Protecting Operators and the Environment: Formulated without hazardous aromatic hydrocarbons or toxic benzene, Aspen 4 burns exceptionally clean. This drastically lowers harmful exhaust emissions, creating a safer, healthier breathing environment for field crews, ground technicians, and boaters.
Operational Notice: Aspen 4 is designed exclusively for four-stroke engines with separate oil and fuel tanks. For two-stroke equipment requiring a pre-mixed fuel-to-oil solution, utilize Aspen 2.