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
Bestseller No. 1
Flow Security Systems | Vented Locking Fuel Tank Cap | For Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Fuel Vandalism | Secures Fuel Tanks | FSS 377M | Male 2" Std Thead
- 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).
$49.95
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SaleBestseller No. 2
Transfer Tank Vented Fuel Cap w/Threaded Neck,Diesel Tank Cap with 2 Inch Base,Fuel Venting Pressure Tank Cap for Diesel Transfer Tank,Fuel Transfer tank,Vented Fuel Storage Tank & Auxiliary Fuel Tank
- 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.
Bestseller No. 3
Transfer Tank Vented Fuel Diesel Tank Cap,Venting Pressure Tank Cap for 2 Inch Base,Vented Gas Cap for Fuel Transfer Tank/Auxiliary Fuel Tank/Vented Fuel Storage Tank-Only Include Vented Tank Fill Cap
- 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.
$16.95
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Bestseller No. 4
Fuel Tank Filler Cap,Gas Cap Compatible With Toyota - 4Runner, Avalon, Camry, Corolla, Highlander, Matrix, Sequoia, Sienna, Solara, Tacoma, Tundra, GX470, ES330, ES300，Replace# 77300-33070 7730033070
- 【Replacement Part Number】-77300-33070, 7730033070 gas cap. Before Ordering, Please Confirm Whether The Accessories Are Suitable For Your Vehicle To Confirm Compatibility！Most fuel caps are sealed by turning them until you hear a clicking sound！
- 【FIT FOR】 -The gas cap compatible with TOYOTA:2003-2009 4Runner,2005-2006 Avalon ,2002-2006 Camry,2005 Corolla,2004-2006 Highlander ( Not For Hybrid ),2005 Matrix,2005-2007 Sequoia,2004-2006 Sienna,2004-2006 Solara ( Exclude Japan Built Part ),2005-2008 Tacoma,2003-2006 Tundra/compatible with Leuxs : 2002-2003 ES300, 2004-2006 ES330,2006 GS300,2006 GS430,2003-2009 GX470,2004-2006 RX330, 2006-2009 tC.Easy Installation And Perfect Fit！
- 【Advantage】- As Time Goes By, The Fuel Filler Cap Of The Car Will Be Loose And Invalid,This Will Increase Fuel Vapor Emissions， May Causes Your Check Engine Light CEL Turns On.Our Fuel Filler Cap Are Designed And Manufactured According To OEM And Can Perfectly Replace Damaged Fuel Filler Cap. The Price Is Only A Small Part Of The Dealer!
- 【High performance】-Long Service Life, Fuel Filler Cap Is Made Of Reinforced ABS Plastic And High-Quality Sealing Rubber,It's More Resistant To Cold And Heat ,Can Adapt To Harsh Weather And Environment. All Fuel Filler Cap Are Tested Before Leaving The Factory To Ensure That The Product Quality Meets The Standards.Provides A Tight Seal To Keep Your Vehicle's Fuel Tank Closed, Safety Your Vehicle's Occupants, Fuel Economy And Reduce Vapor Emissions！
- 【After-Sales Service】- Establish Strict Quality Control Standards, 1 Year Warranty, Buy With Confidence!If you have any questions about Fuel Filler Cap, please contact us, we will help you deal with it as soon as possible！
$10.86
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Bestseller No. 5
DIESEL Only for 2019 2023 Dodge Ram green diesel fuel cap. And DEF Cap. The aluminum fuel tank cap is magnetic
- Please NOTE: Only for 2019 2021 Dodge Ram green diesel fuel cap. The aluminum fuel tank capmagnetic.
- NOT APPLICABLEthe old Dodge RAM before 2019. Please referthe picture. Please check carefully whether your fuel fillersuitable.
- Built-in strong magnet.canattachedthe body when refueling. Therea rubber ringseal the fuel tank port. Prevent dust from entering the fuel tank.
- Aluminum alloy
$41.99
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SaleBestseller No. 6
Fuel Tank Cap Gas Cap Compatible with Nissan 2013-2018 Altima, 2012-2019 Frontier, 2015-2020 Murano, 2013-2019 Pathfinder, 2012-2019 Versa, Infiniti JX35 QX60 Replace# 17251-3JA0A, 17251-9BD0E
- 【FITMENT】Compatible with Nissan 2013-2018 Altima 2.5L 3.5L, 2012-2019 Frontier 2.5L 4.0L, 2015-2020 Murano 2.5L 3.5L, 2013-2019 Pathfinder 2.5L 3.5L, 2012-2019 Versa 1.6L, 2014-2019 Versa Note 1.6L, Infiniti 2013 JX35 3.5L, 2014-2020 QX60 2.5L 3.5L
- 【OEM PART NUMBER】17251-3JA0A, 17251-9BD0E, 17251-1VZ0D
- 【PREMIUM QUALITY】Made of high quality polyamide materials and durable rubber O-ring. Build to factory original quality OE specifications to ensure a proper fit. Make sure you use it for a long time
- 【FUNCTION】It provides good sealing effect, prevents cracking and oil leakage
- 【SERVICE】AUTOBABA offers 1 year product quality support to our customers，If you are uncertain of any problems, please contact us
$10.99
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Bestseller No. 7
Gas Cap, Fuel Tank Cap Fit for Subaru, 2010-2024 Outback Impreza Legacy, 14-23 Forester, 13-23 Brz, 13-24 Crosstrek, 15-23 WRX, 19-23 Ascent gas caps, Replace 42031AJ000 42031FJ000 42031FJ001
- 【Replacement Part Number 】It's time to check and replace your gas cap if you have the following troubles: 1. Your check engine light CEL turns on because of an old, loose, cracked or faulty gas cap. 2. If you smell of gasoline or diesel vapors around or near the fuel filler cap and your car is not smoking or making a unusual noise, please take a minute to check the gas cap. Most fuel caps are sealed by turning them until you hear a clicking sound!
- 【Perfect fit】The Subaru Outback/Forester fuel tank gas cap is made strictly to the original specifications. Direct replacement for a proper fit and easy installation, quality materials used, meets or exceeds OEM standards.
- 【Compatible with Subaru Vehicles】This Subaru Fuel Tank Cap Fit For 2010 -2024 Subaru Legacy Gas Cap | 2010-2024 Subaru Outback Gas Cap | 2012-2024 Subaru Impreza Gas Cap | 2013-2023 Subaru Brz Gas Cap |2013-2024 Subaru Crosstrek Gas Cap | 2014-2023 Subaru Forester Gas Cap| 2015-2023 Subaru WRX Gas Cap | 2015-2021 Subaru WRX STI Gas Cap| 2019-2023 Subaru Ascent Gas Cap. Fuel tank caps for 42031AJ000 42031FJ000 42031FJ001
- 【High Performance】The Subaru Forester Gas Cap is Made of reinforced ABS plastic and high-quality sealing rubber, ensuring high performance and long service life. Provides a tight seal to keep fuel tank closed, safety your vehicle's occupants, ensuring safety for all.
- 【Friendly Note】This Subaru fuel tank gas cap completes with 1 year after-sales service.
$28.86
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Bestseller No. 8
The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | For Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter
- 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.
$44.95
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SaleBestseller No. 9
Gas Cap Fuel Cap For Ford Lincoln Mercury 2004-2009 F150, 2007-2015 Edge, 2009-2020 F250 F350 Super Duty, 2017-2021 F450 F550, 2006-2007 Fusion, 2004-2007 Freestar, 2006-2009 Ranger, FC1079 FC1089
- 【Gas Cap Fuel Cap Replacement】FC1080,FC1079, FC1089, Check The Part Number Before Your Order, It saves you the time of buying back and forth, and also helps you save money.
- 【High Quality】Made of high quality material, the fuel tank cap must be 100% inspected and tested many times before out of factory, durable and reliable. Direct replacement, easy to install.
- 【Super-fit For Ford】Gas Cap Super-fit for Ford, 2004-2009 Ford F-150, 2004 Ford F150 Heritage, 2009-2020 Ford F250 Super Duty, 2009-2020 Ford F350 Super Duty, 2017-2021 Ford F450 Super Duty, 2017-2021 Ford F550 Super Duty, 2004 Ford Focus, 2004-2007 Ford Freestar, 2006-2009,2019-2021 Ford Ranger, 2005-2011 Ford Crown Victoria, 2006-2007 Ford Fusion, 2007-2015 Ford Edge, 2008-2009 Ford Taurus X, 2008-2012 Ford Taurus.
- 【Super-fit For Lincoln】Gas Cap Super-fit for Lincoln, 2005-2011 Lincoln Town Car, 2006 Lincoln Zephyr, 2007-2008 Lincoln Mark LT, 2008-2011 Lincoln MKZ, 2007-2012 Lincoln MKX.
- 【Super-fit For Mercury】Gas Cap Super-fit for Mercury, 2004-2007 Mercury Monterey, 2006-2010 Mercury Milan, 2008-2009 Mercury Sable, 2008-2009 Mercury Mariner.
$6.99
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SaleBestseller No. 10
DICMIC Transfer Tank Vented Cap w/Threaded Neck, Venting Pressure Tank Cap with 2 Inch Base, Diesel Fuel Tank Cap for Diesel Transfer Tank, Fuel Transfer Tank & Vented Fuel Storage Tank
- [HIGH QUALITY] Made of high-quality materials featuring waterproof and corrosion resistance to long term serve your diesel tank. The whole tank pressure fill cap includes a removable transfer tank vented gas cap and 2-inch heavy-duty cast iron base.
- [FUNCTION] When loosen the cap, the venting pressure 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.
- [FITMENT] 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.
- [EASY TO INSTALL] 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 cap and remove.
- [NOTICE] For any reason, if you are not satisfied with your purchase, contact us directly.
$25.99
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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.