If you’ve ever dropped a bike on its side or laid it down on the ground while trying to make a quick repair, you’ve probably noticed a fuel leak. If you’ve ever tried to start a bike that was out of gas, you know how frustrating it is when fuel seeps out of the tank even when the cap is in place. To help prevent the spread of pollutants and the ignition of fuel if there is a leak, all fuel tanks must have caps on them.
So which fuel tank caps are best? We decided to find out by putting a wide range of caps to the test.
Read on to learn which fuel tank caps are best for your bike.
Our Editor’s Best Fuel Tank Caps Reviews
- PREVENT UNAUTHORIZED USE: The Flow Security Systems FSS-377 vented fuel cap is a quick and inexpensive way to safeguard costly fuel and oil from theft, tampering, siphoning and vandalism. The FSS-377 is perfect for anyone who want to secure their fuel tanks.
- MULTIPLE USES: The FSS-377 is designed for use on mobile fuel transfer tanks, as well as above ground commercial tanks.
- DURABLE: This heavy duty cap is made from high quality, CNC machined carbon steel with silver zinc-plating for corrosion resistance and durability.
- BUILT-IN VALVE: The FSS-377 uses a built-in valve to equalize pressure and vacuum. The valve allows the tank to vent when pressure reaches 1.5 psi and releases vacuum at 1.5 oz
- COMPATIBILITY: Fits all 2'' male threaded tanks. Cap is secured to adapter with any 5/16th diameter shackle padlock (not included).
- PREVENT UNAUTHORIZED USE: The Flow Security Systems PRE-VENT Fuel Cap is a quick and inexpensive way to safeguard costly fuel and oil from theft, tampering, siphoning and vandalism. The VersaLock utilizes our patented free spinning design and is perfect for all business owners who want to secure their transfer fuel tanks.
- MULTIPLE USE: The FFS-754 is designed for use on mobile fuel transfer tanks as well as above ground commercial gas and distillate tanks. The VersaLock has a weather proof self-closing latch covering the face of the lock to prevent dust, dirt, debris and moisture from entering the lock.
- KEYED DIFFERENTLY OR THE SAME: The VersaLock can be keyed alike so that multiple fuel caps can be secured with the convenience of having only one key. Perfect for those who have multiple transfer tanks and don't have to carry different keys for each tank. The VersaLock can also be keyed differently so that each fuel cap can have its own unique key providing added security for your tank.
- BUILT IN VALVE: The FSS-754 uses built in valves to equalize the pressure and vacuum. The pressure vent valve allows the pressure relief valve to open at 1.5 Lbs and vacuum release to open at 1.5 Oz. This heavy duty lock is make from hard non ferrous alloy and fits standard 2 inch male thread.
- PATENTED DESIGN: The FSS-754 is different from any other cap on the market today. It is designed with our patented "free-spinning" technology. When the cap is in the secure mode the cap will free spin making it virtually impossible to remove.
- Fitment: Transfer tank vented cap replace for Dee Zee Fill-Rite transfer tank cap and fit for standard 2" NPT threaded tank bung base. Diesel tank cap works well for ground, farm, commercial and distillate tanks, such as transfer tank, fuel tank, gas tank, diesel tank, auxiliary fuel tank, mobile fuel tank and weather guard tank.
- Both Directions Vent: When loosing the diesel tank cap, the venting pressure tank cap vent pressure inside the fuel tank to outside and release dangerous vapor build up to prevent over-expansion of the diesel fuel tank. And vented fuel cap allow air into the diesel transfer tank to prevent vacuum forming and collapse the tank when you draw out fuel.
- Added Security for Diesel Tanks Fuel: Lockable diesel fuel tank cap fit for 1/4" - 5/16" diameter shackle padlock (not included), which secure your fuel tanks and prevent costly oil fuel from theft,tampering, siphoning and vandalism. Just put a padlock in lock hole that is right on one of the tabs on the base and the tabs will hold the lock.
- Prevent Leaking: Transfer tank fuel cap with spring loading and inside gasket is seal when tightly closing to prevent leaking and excess gas vapor venting even drive in road.
- Easy to Use: Align the vented gas cap with the notch, push down and clockwise twisting to tighten the diesel tank cap all the way. To remove transfer tank cap, counter-clockwise twist slowly to the notch to vent pressure. Push down and twist to lift pressure vent fuel cap and remove.
- 【621501-10 Manual Vent Gas Cap】 The marine gas tank cap is specifically designed to be compatible with old style portable M'oeller and T'empo fuel tanks.
- 【Manually Vented】Our vented gas cap for boat fuel tank features a twist valve for adjustable ventilation. Fits tight with no leaks and the vent screw is easy to turn for release and close.
- 【Wide Compatibility】The marine fuel tank cap is compatible with a wide range of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025 portable boat gas tank.
- 【Compatibility】Boat gas tank cap fits A'ttwood 12 gallon, 6 gallon and 3 gallon tanks, B'ass Tracker boat tank, S'cepter 12 gal and 6 gallon tank, 3 gallon Q'uicksilver plastic gas tank, old 6 gallon plastic Dura-Tank Essence, M'ercury plastic tank, Y’amaha and more.
- 【High Quality Material】The vented gas cap for boat fuel tank is made of high hardness plastic materials, which is well made, sturdy, will not rust, resistant to corrosion and aging, well tested to ensure long service time.
- Fitment: Transfer tank vented cap replace for Dee Zee Fill-Rite venting pressure tank cap and fit for standard 2" NPT threaded tank bung base. Diesel tank cap works well for ground, farm, commercial and distillate tanks, such as transfer tank, fuel tank, gas tank, diesel tank, auxiliary fuel tank, mobile fuel tank and weather guard tank.
- Both Directions Vent: When loosing the cap, the transfer diesel tank cap vent pressure inside the tank to outside and release dangerous vapor build up to prevent over-expansion of the fuel tank. And allow air into the diesel transfer tank to prevent vacuum forming and collapse the tank when you draw out fuel.
- Prevent Leaking: Fuel transfer tank cap with spring loading and inside gasket is seal when tightly closing to prevent leaking and excess gas vapor venting even drive in road.
- Easy to Use: Align the transfer tank fuel cap with the notch, push down and clockwise twisting to tighten the diesel tank cap all the way. To remove transfer tank cap, counter-clockwise twist slowly to the notch to vent pressure. Push down and twist to lift pressure vent cap and remove.
- Heavy-duty Diesel Tank Cap: Made of high quality materials featuring waterproof and corrosion resistance to long term serve your diesel tank. The transfer tank vented cap package only includes a removable transfer tank fuel cap.
- genuine gates oe equivalent fuel cap
- Fit type: Vehicle Specific
- Fenderwell Fuel Caps are zinc-plated and dichromate dipped for superior corrosion resistance
- Model Number: 31748
- HEAVY DUTY: Manufactured to the highest standards and built to last a lifetime. Cap and adapter are made from high quality carbon steel, CNC machined for precise fit and function, and case hardened for durability and resistance to drilling and damage.
- COMPATIBILITY: This cap is sealed and can only to be used on fuel tanks that have independent venting.
- VERSATILE: Fits all 2” male or female fuel tanks.
- CORROSION RESISTANT: Once hardened the cap and adapters are silver zinc plated for corrosion resistance.
- PADLOCK: The cap has 4 elongated slots machined on the shoulder to allow for a padlock (NOT INCLUDED) to align with one of the 12 holes (5/16" diameter) in the adapter.
- Provides a tight seal to keep your vehicle's fuel tank closed
- A sealed fuel tank reduces vapor emissions which helps the environment
- Prevents lost fuel in order to help reduce your trips to the gas station
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- gates rubber products 31835d fuel cap - diesel only
- Fit type: Vehicle Specific
- Model No: 31835D
- item package weight: 0.78 pounds
- Applicable: This tank vented cap replaces the D-ee Zee F-ill-Rite transfer tank cap. Comes with a 2'' NPT threaded tank plug base.
- Easy to Use: Installation is accomplished by aligning the cover with the groove, pressing down and rotating clockwise. Removal is accomplished by pressing the cover down and rotating it counterclockwise.
- Ventilation: Relaxing the vent cap allows the pressure in the tank to be vented, preventing the transfer tank from over-expanding. The vent cap also allows air to enter the diesel fuel tank, preventing a vacuum from forming inside the tank.
- Leak-Proof Design: The iron base fits snugly into the vented cap. And the vented cap have springs and seals inside to prevent leakage of fluids inside the tank.
- Wide Application: Fits for transfer tank, diesel tank, fuel tank, gas tank, mobile fuel tank auxiliary fuel tank and weather guard tank.
Best Fuel Tank Caps Buying Guide
Before choosing the best fuel tank caps you should consider following options:
1. Fuel Tank Cap Types: Fuel tank caps are available in two types: rubber and plastic. The most common caps are made from plastic.
Plastic caps are more affordable, lighter and easier to maintain. Rubber caps, on the other hand, last longer and can resist damage from ultraviolet rays.
2. Size: Fuel tank caps come in standard sizes, which makes it easy to find replacements. Note the tank cap size before buying new caps.
3. Durability: Fuel tank caps are exposed to harsh conditions, so you need to get something that can withstand abuse.
Look for caps made from durable materials, such as stainless steel. Caps with rubber gaskets are also a good choice because they won’t break down as quickly as plastic ones.
4. Ease of Use: Tank caps are required to contain fuel, so they have to be easy to open and close.
Consider fuel tank caps that have easy-to-use locking mechanisms. Caps with rubber gaskets are also easier to close because they create a tight seal.
5. Cost: Fuel tank caps are available in different price ranges, so you can get something that suits your budget.
What else you should know about fuel tank caps
1. What is the purpose of a fuel tank cap?
The purpose of a fuel tank cap is to seal the opening of the fuel tank. This helps to prevent fuel leakage and evaporation, and keeps dirt and water out of the tank.
2. How does a fuel tank cap work?
A fuel tank cap works by sealing the fuel tank and preventing fuel vapors from escaping.
3. What are the benefits of using a fuel tank cap?
There are several benefits to using a fuel tank cap:
1. It helps to prevent fuel evaporation, which can lead to loss of fuel and decreased gas mileage.
2. It helps keep water and other contaminants out of the fuel tank, which can clog fuel filters and lead to engine problems.
3. It helps prevent fuel leaks, which can be dangerous and costly.
4. What are the drawbacks of using a fuel tank cap?
Some drawbacks of using a fuel tank cap include the potential for the cap to leak, the cap not sealing properly, and the cap not fitting snugly on the fuel tank.
5. What are the different types of fuel tank caps available?
Some common types of fuel tank caps are vented, non-vented, locking, and threaded.
Conclusion
On the market, there are numerous best fuel tank caps. Hopefully, the list of the top ten best fuel tank caps will save you time researching and deciding on the best one for you.