Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.13 Best 500 Gallon Gasoline Tank | Stop Hauling Gerry Cans

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This 116-gallon rotomolded polyethylene tank is built specifically for gasoline, with DOT-rated fittings that handle the higher volatility compared to diesel. The 2-inch filling plug includes a three-effect vent system that manages pressure, de-pressure, and prevents overturning during refills. A 13-foot grounding cable and clamp come standard, meeting the basic safety requirement for static discharge protection.

The integrated 13-foot hose and pump deliver fuel at a usable rate, and the lockable covering lid protects the fill port from weather and tampering. Forklift pockets on the sides allow you to move the tank even when it’s full — a full load weighs over 730 pounds, so the structural integrity of the pockets matters. Users report the pump primes reliably out of the box, though the nozzle’s venturi can clog with debris if the tank interior wasn’t cleaned before first use.

One reviewer noted the ground strap feels flimsy and the pump toggle switch lacks a positive detent, so you may want to add a locking cable to prevent accidental activation. For fleet managers or large farm operations that need a mobile gasoline caddy with genuine gasoline-rated components, this is the most complete ready-to-run package available at this capacity.

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The Dee Zee DZ92647B is an L-shaped combo unit that marries a 92-gallon gasoline transfer tank with a lockable tool box on top. The tank is constructed from 0.125-inch brite-tread aluminum, which resists corrosion far better than painted steel and weighs less — important when you consider the total vehicle payload. The black powder coat finish on the tank section provides additional protection against road salt and UV exposure.

With overall dimensions of 46.75 inches wide by 32.75 inches deep and 25.375 inches tall, this unit fits most full-size short-bed trucks, leaving the front of the bed usable. The aluminum construction means it will not rust internally from ethanol-blended gasoline, a failure point common in steel tanks that lack an internal liner. Users report that the tool box section holds 15 chains, binders, a full-size floor jack, and multiple sets of sockets, which makes this a dual-purpose solution for working contractors.

The primary complaint across multiple long-term reviews is that the mounting brackets can snap off within 30,000 miles, especially on rough job-site roads. Even with rubber isolation pads, the bracket design appears under-engineered for the dynamic loads of an off-road truck. If you can reinforce the brackets with additional steel or switch to a custom mounting plate, this tank is otherwise excellent.

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The DZ92647SB is the steel variant of Dee Zee’s combo tank, using 14-gauge steel with an NRT powder coat designed to increase corrosion resistance compared to standard paint. The same tool box integration works here, offering storage for chains, binders, and tools directly above the fuel compartment.

The steel walls are sturdy enough to handle the stresses of a full 92-gallon gasoline load, and the powder coat finish holds up well against scratches from chain binders and tools stored on top. Fitment in a 2022 Ford truck was reported as perfect, with the unit sliding into the bed and bolting up without modification. The integrated NRT (No-Rust Technology) coating is a step above standard paint but still requires vigilance — any scratch that exposes bare steel will begin to rust in humid or salt-spray environments.

The same bracket failure issue present on the aluminum version also affects this steel model. Multiple users report broken mounting brackets within 30,000 miles, even with rubber isolation pads installed. The steel body itself is robust, but the attachment points are the weak link. Reinforcing the brackets or using a custom mounting solution is recommended for anyone who operates on unpaved roads.

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This 58-gallon rotomolded polyethylene tank from AM-TANK is specifically dimensioned to fit under most truck tonneau covers while still offering a 12 GPM transfer pump. The pump is a 300-watt, 22-amp DC unit with a 30-minute duty cycle and IP55 weather resistance, which is a serious step up from the 10 GPM pumps commonly found on cheaper tanks. The 20-foot wiring cables with clamps make battery hookup straightforward.

What sets this unit apart is the integrated particulate and water separator filter system. The two-stage filtration catches large debris with a pre-filter and then captures smaller contaminants down to 30 microns, protecting your equipment’s injectors from water and sediment. The 13-foot flexible hose with an automatic shut-off nozzle prevents overfills, and the locking draw latches on the protective cover keep the system secure.

The pump is the weakest component — several users report failure after between 200 and 300 gallons pumped. The replacement pump provided under warranty had the same issue, suggesting the pump design may be undersized for sustained use. The fuel level gauge is also known to be inaccurate, and the tank’s usable capacity is about 95 percent of the rated 58 gallons due to internal geometry. If you can tolerate replacing the pump with a Fill-Rite aftermarket unit, the tank body itself is excellent.

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TITAN’s 5410050 is a vehicle-specific auxiliary tank system designed to mount directly in the bed of a pickup truck, with bolt patterns and filler neck locations matched to specific makes and models. The 50-gallon capacity is smaller than many portable caddies, but the advantage is a clean OEM-style installation that looks factory and preserves bed space. The tank is made from impact-resistant polyethylene with a metal exterior finish that blends with the truck bed.

Installation takes approximately four hours for a mechanically inclined person and includes all necessary brackets, hoses, and hardware. Users report that the tank saves between and per gallon by allowing bulk fuel purchases, with a return on investment of roughly two years for frequent drivers. The included pump is adequate for refueling the truck’s main tank, with controls mounted conveniently for easy access.

Several reviewers note that the vent adapter lacks barbs, creating a potential leak path if the hose is not clamped tightly. The included clamps are too small for the hose diameter, requiring a trip to the hardware store for proper fittings. The installation template alignment can also be tricky — aligning with the bed top rail rather than the front wall avoids misdrilled holes. Once installed correctly, the tank is durable and reliable.

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The JohnDow JDI-AFT58 is a 58-gallon auxiliary tank made from rugged linear polyethylene with a 12-volt transfer pump that delivers fuel at 10 gallons per minute. It includes integrated forklift pockets, so you can move the tank even when it is full of fuel, and recesses for ratchet straps that keep it secure during transport. The lockable protective cover shields the pump and fill port from weather and theft.

This tank is designed for universal fit in a truck bed or trailer, with dimensions of 37 inches long by 24 inches wide by 26 inches high. Users report that the lightweight polyethylene construction (58 pounds empty) makes installation manageable with two people, and the auto-shutoff nozzle works reliably to prevent spills. The pump primes easily and delivers fuel fast enough to eliminate the frustration of lifting five-gallon cans.

The most notable limitation is that the tank lacks a built-in water separator or fuel filter. For gasoline storage, water condensation inside the tank can contaminate your equipment’s fuel system. JohnDow itself did not provide a filter recommendation when asked. Adding an inline fuel filter between the pump and nozzle is a simple fix, but it is an additional cost and installation step that should have been included from the factory.

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The RDS MFG 71791 is a 91-gallon rectangular aluminum transfer tank with dimensions of 57 inches long by 29 inches wide by 19 inches tall, designed to fit under many truck tonneau covers. The machined aluminum finish resists rust and does not require painting, and the low profile preserves rear visibility. This tank is shipped as a bare tank only — no pickup tube, pump, hose, or nozzle are included.

RDS explicitly states that gasoline auxiliary fueling is allowed only if siphoned from the top of the tank using an electric fuel pump, meaning you must purchase and install your own transfer system. For diesel users, gravity feeding via a bottom port is an option. Users report that the tank fits well in short-bed trucks and has stood up to thousands of gallons of fuel transfer over years of use without failure.

The mounting tabs come undrilled, requiring you to measure and drill the holes yourself to match your truck bed. One unit arrived with a bent mounting tab from shipping, though the customer noted it did not affect the tank’s integrity. The lack of a pump or any included components means this tank is best suited for buyers who already own a transfer pump or prefer to install a specific pump system of their choice.

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VEVOR’s 116-gallon transfer tank is made from linear low-density polyethylene (LLDPE) with UV stabilizers, making it one of the most affordable large-capacity options on the market. It includes a 12V pump with a 10 GPM flow rate, a 13.1-foot hose, and an automatic shut-off nozzle. The duplex filter system has a front-end separator for large particles and a premium outer filter for smaller impurities down to metal and colloid scale.

The mechanical fuel gauge lets you monitor capacity at a glance, and the lockable copper lid adds basic security. Grooved sides and forklift pockets allow the tank to be secured and moved, and the overall weight of 91.3 pounds empty means two people can maneuver it into a truck bed when it is empty. Users report that the pump primes easily and delivers fuel reliably after a few initial setup tweaks.

The primary issue across multiple reviews is that the tank arrives with loose fasteners and residual plastic shavings from manufacturing. The supplied O-rings may not be gasoline-compatible, causing leaks at the pump handle — replacing them with stiffer O-rings and using Teflon tape on threaded connections resolves the issue. The fuel gauge is also reported to be inaccurate, reading full or empty incorrectly depending on the fill level.

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The RDS MFG 72771 is a 60-gallon aluminum fuel tank designed to fit under a tonneau cover, with dimensions of 55 inches long by 20 inches wide by 12.75 inches tall. The machined aluminum exterior finish resists rust and corrosion, and the locking automotive-style fill cap adds security. This tank is a bare unit with no pump or hose included, intended for diesel use with a gravity feed or external electric pump.

Users consistently report that the tank fits well under hard and soft tonneau covers in full-size trucks, with the low 12.75-inch profile leaving plenty of clearance. The installation process is straightforward with the correct mounting kit, though some older Ford trucks (2001 model year) require modification to the filler valve inlet. The 60-gallon capacity effectively doubles the fuel range of most diesel trucks.

The most common complaint is that the tank holds approximately 50 gallons of usable fuel, not the rated 60 gallons. The internal baffling and pickup tube positioning leave about 10 gallons of unusable space. Several users also note that the cutoff valve in the fuel fill hose restricts the fill rate, making it take up to two hours to fill the tank completely. Adding an electric pump bypassing the factory fill valve solves this issue.

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The RomoTech 82124269 is a 550-gallon horizontal polyethylene storage tank with integrated leg channels for tie-down during transport. It is constructed from UV-stabilized, medium-density polyethylene that resists cracking, warping, and outdoor degradation. The dome top includes a 5.5-inch fill cap with a 5-inch diameter hole, and the side-mounted 2-inch NPT outlet with a built-in bulkhead fitting allows for siphoning or hose attachment on-site.

This tank is designed for potable water, agricultural solutions, or non-flammable industrial and chemical liquids — it is not rated for gasoline or any flammable fuel. The BPA-free material is safe for drinking water storage, and the translucent wall with molded-in gallon and liter markings lets you check levels without opening the lid. Users praise the thick wall construction and report that the tank withstands freezing conditions without cracking.

The 78-inch length and 48-inch width mean this tank requires a substantial trailer or a dedicated stationary pad. It weighs 160 pounds empty, so two people can position it, but moving it once filled with water (over 4,500 pounds) requires a forklift or a pump-out strategy. The lack of forklift pockets is a notable omission for a tank this large — you must build a cradle or use a pallet to move it when full.

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The RomoTech 82124749 is a 550-gallon vertical polyethylene tank with a 12-inch lid and a 2-inch NPT outlet, designed for non-flammable liquids including potable water and agricultural chemicals. The cylindrical shape has a compact 67-inch diameter footprint, making it suitable for tighter spaces where a horizontal tank would not fit. The UV-stabilized polyethylene resists corrosion and degradation from sun exposure.

This tank is intended for stationary installation — it does not have forklift pockets or integrated tie-downs, so it is best suited for permanent placement on a concrete pad or gravel base. The translucent wall with molded gallon and liter markings provides easy level monitoring, and the wide fill cap allows for rapid refilling from a hose or bulk truck. Users report that the tank survives full winter freezes with water inside without cracking, a testament to the material’s flexibility.

The 2-inch NPT bulkhead fitting is one of the few potential leak points, and a small percentage of users report leaks at the outlet threads. The manufacturer and seller are described as difficult to work with for warranty claims, so it is worth applying pipe sealant to the threads during installation as a preventive measure. This tank is not rated for flammable liquids and should never be used for gasoline storage.

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The Flame King CYL200ASME is a 200-pound (approximately 48-gallon water capacity) ASME-certified vertical propane tank with pre-installed multi-valves including a service port, fill port, fixed liquid level port, and relief valve. The accurate gas level gauge prevents you from running out of propane unexpectedly. The durable epoxy coating provides long-lasting rust protection, and the plastic lid cover protects the valves from debris and weather.

ASME cylinders have a key advantage over DOT cylinders — they do not require mandatory recertification after 12 years from the date of manufacture, which saves money over the tank’s lifespan. The tank ships empty, pre-purged, vacuum-sealed, and ready for propane filling. X-ray and hydrostatic testing are performed at the factory to ensure structural integrity.

At 160 pounds empty, this tank requires two workers to handle during installation. Some propane delivery companies in certain areas refuse to fill ASME tanks located at RV parks, so it is important to confirm with your local gas supplier before purchasing. Users in Colorado and other states reported difficulty finding propane delivery services willing to service ASME tanks in RV park settings.

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The Flame King YSN420ASME is a 420-pound (120-gallon water capacity) ASME vertical steel propane tank with a pre-installed float gauge that can accommodate a remote-ready dial for accurate gas level readings from inside your home. It comes fitted with high-quality valves — a 1.25-inch ACME fill valve, service valve, and relief valve — and ships empty, pre-purged, and vacuum-sealed for immediate filling by a propane supplier.

The powder-coated finish provides excellent rust protection, and the plastic lid cover protects the valves and gauge from weather. Like all ASME cylinders, this tank does not require recertification after 12 years, making it a long-term investment for homeowners, RV enthusiasts, or off-grid setups. Users report paying roughly per gallon for propane with an owned tank, compared to or more per gallon with rented tanks, delivering significant savings over a few heating seasons.

Some propane refill stations may be unfamiliar with ASME tanks and question the purchase, but any certified propane supplier can fill it. The tank requires a stable concrete pad or gravel base for installation, and you will need to connect it to your propane regulator — no special equipment beyond standard brass fittings is required. The tank is heavy and requires professional delivery placement; one user reported the delivery crew placed it on the pad without issue.