
Ford Mustang's capless fuel system is a convenient and secure way to refuel your car, but it can be tricky to add fuel additives to the tank. The capless technology features a spring-loaded flapper that can only be released by a fuel nozzle, which is designed to deter fuel theft. However, there are a few methods you can use to add fuel additives to your Ford Mustang's capless tank. Some Mustang models include a special funnel in the trunk or with the spare tire, which can be inserted into the gas tank to release the cap lock and allow you to add additives. Alternatively, you can use a long, narrow metal or plastic tube with a similar diameter to a fuel nozzle to disengage the locks, and then pour the additive into the tank using a small funnel.
| Characteristics | Values |
|---|---|
| Capless fuel filler technology | Easy Fuel® |
| Capless filler release mechanism | Diameter and design of the gas pumps |
| Ford's special funnel location | In the trunk, under the mat, by the spare tire |
| Funnel cost | $8 |
| Funnel alternatives | Long-neck funnel, long narrow metal or plastic tube |
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What You'll Learn

Using the funnel provided by Ford
To add fuel additives to a capless tank in a Ford Mustang, you can use the funnel provided by Ford. This funnel can be found in the trunk, under the mat, or in the rear cab of the car. It is white and plastic, and it is designed to fit into the gas tank and release the cap lock.
To use the funnel, first locate it in your vehicle. If you are having trouble finding it, check your owner's manual, which will provide specific instructions for your model. Once you have located the funnel, insert it into the gas tank. You may need to apply some force to push it past the metal flap at the top of the gas filler tube.
With the funnel in place, you can now add your fuel additive. Pour the additive slowly and carefully into the funnel, ensuring that it does not overflow. Once you have added the desired amount of additive, you can remove the funnel and securely replace the cap on the gas tank.
It is important to note that some Ford Mustang owners have reported challenges in using the provided funnel. In some cases, the funnel may not fit securely in the gas tank, or it may be difficult to insert. If you encounter these issues, you may need to purchase a separate nozzle or filler plug of a similar size to the funnel. These can be found at Ford dealerships or parts centers.
Overall, using the funnel provided by Ford is a convenient and effective way to add fuel additives to your capless tank in your Ford Mustang. By following the steps outlined above, you can ensure a safe and successful refueling process.
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Using a long-neck funnel
To add fuel additives to a capless tank in a Ford Mustang, you can use a long-neck funnel. Here's a step-by-step guide on how to do it:
Firstly, locate the funnel provided by Ford. Newer models of the Ford Mustang are equipped with capless technology and include a special funnel in the trunk of the car. This funnel is designed to fit the capless fuel filler and facilitate the addition of fuel additives. Check under the mat in the trunk, as it may be located there.
If you cannot find the provided funnel, you can purchase a replacement from a Ford dealership or parts center. These funnels are typically available for around $30. Alternatively, you may be able to use a long, thin funnel, such as a transmission funnel, to add the fuel additive. Ensure that the funnel has a narrow diameter that matches the nozzle of a gas pump. This will allow you to disengage the locks or tabs on the spring-loaded door of the fuel filler.
When using the funnel, be careful to select one with an appropriate diameter. Some users have reported that funnels with a very thin diameter can get stuck in the filler neck. Choose a funnel made of quality material that is heavy-duty and less likely to bend or break during use. You may also want to place the car on level ground to ensure stability during the process.
Once you have the appropriate funnel, carefully insert it into the fuel filler neck of your Ford Mustang. The funnel should disengage the locks or tabs and allow you to open the spring-loaded door. Slowly and carefully pour the fuel additive into the funnel, ensuring that it flows into the gas tank without spilling.
After adding the fuel additive, it is recommended to fill the tank with gas to help mix the additive thoroughly. Properly clean and store the funnel after use, or dispose of it if it is intended for one-time use.
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Using a metal or plastic tube
To add fuel additives to a capless tank in a Ford Mustang, you can use a metal or plastic tube. Here's a step-by-step guide:
First, locate the white plastic filler tube on top of the spare tire in the trunk of your Mustang. This tube allows you to access the gas tank and is designed to work with the capless system. Insert the tube into the gas tank.
Next, take a long, narrow metal or plastic tube with a diameter similar to a fuel nozzle. Insert this tube into the white plastic filler tube. This action will disengage the locks or tabs on the spring-loaded door, allowing you to access the gas tank.
Now that you have access to the gas tank, you can use a small funnel to pour the fuel additive into the tube. If you don't have a funnel, you can carefully pour the additive directly from the container into the tube. Ensure that you are careful and avoid any spills.
Once you have added the desired amount of fuel additive, remove the metal or plastic tube from the white plastic filler tube. Make sure that the area is clean and free of any spills before replacing the filler tube cap.
It is important to note that some Ford Mustang owners have reported challenges with adding fuel additives to the capless tank. In some cases, you may need to purchase a nozzle or filler plug of a similar size to the fuel filler neck. These can be found at Ford dealerships or parts centers. Additionally, always refer to your owner's manual for specific instructions and safety precautions when working with fuel and fuel additives.
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Pouring additive into the pump spout
If you want to add fuel additives to your Ford Mustang's capless tank, you can use the funnel provided by Ford. This funnel is designed to fit into the capless system and release the cap lock. You can find it in the trunk, usually under the mat or in the spare tire well. If you don't have the funnel, you can purchase one from a Ford dealership or parts center for around $30.
Now, onto the step-by-step process of pouring the additive into the pump spout:
Firstly, locate the pump spout. This is the fuel tank filler neck/inlet, which is located in the capless fuel filler.
Next, you will need to depress the little tabs in the filler tube to open the valve. You can use a screwdriver to do this if needed.
Once the valve is open, carefully pour the fuel additive into the pump spout. You might need to do this in several pours, as it may not all fit in at once.
Finally, make sure to clean the funnel or dispose of it properly afterward, as per the owner's manual.
It is worth noting that some owners have mentioned that the funnel provided by Ford is quite small, so you may prefer to use a longer-necked funnel. Additionally, always refer to your owner's manual for detailed information about your specific model.
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Purchasing a nozzle or filler plug
If you own a Ford Mustang with a capless fuel tank, you may need to purchase a nozzle or filler plug to add fuel additives. While Ford includes a special funnel in the trunk of every new model with capless technology, some owners have reported needing to buy a nozzle of a similar size or a filler plug to be able to add fuel additives.
These products can usually be purchased at Ford dealerships or parts centres for around $30. It is important to note that the Easy Fuel capless fuel filler system is designed to only allow the insertion of a fuel nozzle of the appropriate size. This helps to prevent fuel vapours from escaping into the atmosphere and deters fuel theft.
When purchasing a nozzle or filler plug for your Ford Mustang with a capless fuel tank, it is important to ensure that it is the correct size and compatible with your vehicle. You can refer to your vehicle's owner's manual or seek advice from a Ford dealership or a trusted automotive parts store.
Some aftermarket companies offer capless fuel funnels specifically designed for Ford Mustangs, claiming to provide a safe and convenient solution for adding fuel additives. These funnels are designed to engage the filler flap without causing any damage, which may be a concern when using other funnels or nozzles not designed for this purpose.
In addition to purchasing a nozzle or filler plug, it is recommended to refer to your vehicle's owner's manual for specific instructions on adding fuel additives to your Ford Mustang with a capless fuel tank. Following the manufacturer's guidelines will help ensure a safe and proper procedure.
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Frequently asked questions
Ford provides a special funnel in the trunk of every new model with capless technology. You can also find a funnel in the rear cab of your vehicle. Insert the funnel to release the cap lock and add fuel additives.
You can purchase a funnel from a Ford dealership or parts center for around $30. Alternatively, you can use a long-neck funnel with a screwdriver to depress the tabs in the filler tube.
Any long, narrow metal or plastic tube with the same diameter as the nozzle will disengage the locks/tabs on the spring-loaded door. You can then use a small funnel to add the fuel additive.
Capless technology deters gas theft through a spring-loaded flapper that can only be released by a fuel nozzle.











































