DIESEL FILL - MISFUELLING PREVENTION DEVICE
DIESEL FILL - MISFUELLING PREVENTION DEVICE
SKU:DF
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PRODUCT DESCRIPTION
The Diesel Fill fuel cap provides a tested and approved solution to prevent misfuelling by physically blocking the wrong fuel nozzle from being inserted. It only opens when the correct nozzle is used, ensuring your vehicle is always properly fuelled.
Diesel Fill is available for vehicles with screw on fuel caps only. For assurance please check our Diesel Fill Compatibility Sheet here or contact us on (02) 6280 4334.
If you need to transfer fuel from jerry cans etc or add additive, consider buying the kit that includes the syphon adaptor. This will allow you to open to mechanism. Click here.
Please note:
- The Diesel Fill cap does not accept high-flow diesel nozzles
- It may not be compatible with aftermarket long range fuel tanks due to the large volume of air that needs to be expelled while refuelling.
This kit contains:
- Diesel Fill Misfuelling Prevention Device
- Diesel Fill Fitting Tool used for install and removal of the Diesel Fill from the filler neck.

Easy to fit looks good quality
Haven’t filled up yet. Fast efficient ordering and delivery. Clear installation instructions.
Great idea
It just works.
Great product but made of light duty plastic which will probably go brittle over time.
Thanks so much for the feedback — really appreciate you taking the time to share your thoughts.
Just to clarify, the device is blow-moulded from the same grade of polymer used by vehicle manufacturers for their fuel caps, so it’s designed to handle temperature variation, vibration and long-term use. We’ve had one fitted to our own vehicle for over nine years now, and it hasn’t gone brittle or shown any signs of ageing. We also haven't had any returns or feedback of this nature from fleet companies or customers.
We stand by the quality of our products 100%, so if you ever do experience a manufacturing issue, such as brittleness, we’ll happily replace it or offer a refund — no questions asked. We’d much rather help you replace or refund it than have you get frustrated and give up on it.
Thanks again for your review.
All the best,
Sarah