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Main: (503) 987-4000





The RotopaX 4 Gallon Gasoline Fuel Pack is the largest fuel pack in the RotopaX lineup and the right choice when you need maximum reserve capacity in a single, mount-ready container. Four gallons of backup fuel covers a lot of ground — whether you are deep in the backcountry, running a long desert route, or just want the comfort of knowing you have a serious buffer between you and an empty tank. For expedition-level builds and serious overland rigs, this is the pack that gives you the most fuel with the same proven construction as the rest of the RotopaX system.
At 34 inches tall and just 3 inches deep, the 4 gallon keeps the same slim profile as the 1 and 2 gallon packs — it simply runs longer to achieve the additional capacity. That slim 3-inch depth means it still mounts flush against bed racks, roof racks, spare tire carriers, and tailgates without creating excessive drag or sticking out awkwardly from your build. Construction is the same patented three-layer roto-molding process with specialty barrier material that makes RotopaX the only rotationally molded EPA and CARB compliant fuel containers sold in the United States. The sure-seal gasket, reinforced handles, and thick-walled build keep everything secure and leak-free no matter what the trail throws at it.
One important thing to plan for: due to its length, the 4 gallon requires two mount points rather than one. Make sure your mounting location has enough room and the right hardware before ordering. Once it is dialed in, it is a clean, capable setup that carries more fuel than any other pack in the lineup without adding complicated plumbing or a secondary container to your rig.
We ship throughout the United States. Most in-stock items leave our shop within 1–3 business days. Made-to-order, special-order, drop-shipped, freight, and oversized products may require additional processing or lead time. Any known special timing or availability information will be noted on the product page when applicable.
Orders placed outside of our normal business hours will be processed as soon as possible once our team returns during regular operating hours, Monday–Friday. Orders placed over the weekend or on a holiday will begin processing the next business day.
Eligible items may be considered for return within 30 days of delivery. All returns require prior authorization from PAD Overland. Return requests are subject to our return policy as well as any applicable manufacturer or supplier return requirements.
Approved customer-requested returns are subject to a 35% PAD Overland restocking fee, plus any additional return-related fees imposed by the manufacturer, supplier, or distributor.
Many products sold by PAD Overland include a manufacturer warranty. Warranty claims are subject to the individual manufacturer’s warranty terms and procedures. We are happy to help facilitate the process when possible. Please contact us with your order number, photos, and a description of the issue.
Questions about fitment, shipping, return eligibility, or a special-order product? Please contact us before placing your order. Our team is happy to help make sure you are ordering the correct product for your vehicle.
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