
The Fuel Angel
The misfuelling prevention device
THE FUEL ANGEL MISFUELLING PREVENTION DEVICE
effortlessly replaces your current diesel fuel cap, ensuring you avoid accidental misfuelling with a petrol nozzle.
THE FUEL ANGEL is compatible with most diesel vehicles – regardless of make, model, or age.
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Assurance
Protection against potentialmisfuelling risks
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Simplicity
Quick installation with onlyone tool required
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Reliability
Strength, durability and dependability

The Fuel Angel
The Misfuelling Prevention Device
Eliminate the risk of misfuelling your diesel car with The Fuel Angel Misfuelling Prevention Device. Replacing your regular diesel fuel cap with The Fuel Angel cap provides a guaranteed physical barrier against accidental misfuelling.
Say goodbye to petrol misfuelling worries for good.
Compatible with most diesel vehicles - regardless of make, model, or age.

Steel Blocker
Strong and durable with minimal risk of breakage
Plastic Blocker
Prone to breakage and associated fuel tank damage
Locking Key
Supplied key prevents accidental removal of cap
Hand Fitted
Without secure fitting, cap can be accidentally removed
Sealed One-Way Ventilated Cap
Prevention of outside contaminant entry
Cap Not Sealed
Does not provide protection against outside contaminants
Watertight Fuel Cap
Zero water intrusion, even while high-pressure washing
Not Watertight
Risk of water intrusion and fuel contamination
Anti-Siphoning
Assurance and protection against fuel theft
Siphoning Encouraged
No safeguards or protection against fuel theft
Zero Maintenance
Reliable, long-term, effective performance
Required Regular Maintenance
Product can be unreliable, inefficient, and costly to replace
Stages of Misfuelling
Stage 1
Pre-Start Realisation
Occurs when you realise the misfuelling mistake before starting the engine.
This stage involves catching the error early, minimising potential impact on your car.
Stage 2
Post Drive Discovery
At this stage, the damage of misfuelling has already occurred. Petrol is more refined than diesel, making it less oily. Diesel engines and fuel have been designed to rely on the higher oil content of diesel fuel to lubricate the diesel engine naturally. When petrol is in a running diesel engine, it causes damage by losing lubrication and eventually failing to operate.
Stage 3
Full Effect of Misfuelling
Involves not realising the misfuelling error until after your diesel car has seized. This will result in catastrophic mechanic failure, with expensive repairs which will be time-consuming and stressful.
Faqs
Find answers to the most common questions of our customers.
Didn’t find what you need? Send us a message via our CONTACT US page.
Can I transfer The Fuel Angel to another vehicle if I sell my car?
Transferring The Fuel Angel depends on the compatibility between your vehicle’s make and model and the specific Fuel Angel unit. It is essential to check compatibility, as different units may be designed for fittings (for example, screw fit or bayonet). Sometimes, you may need to purchase a separate unit for your new car. If unsure, reach out to us on our contact page, and we can confirm the compatibility before attempting to transfer The Fuel Angel to another vehicle.
Does the Fuel Angel replace my current diesel fuel cap?
Yes, to install The Fuel Angel, you will need to remove your existing diesel fuel cap. The Fuel Angel then replaces the fuel cap, ensuring you avoid accidental misfuelling with a petrol nozzle.
What should I do if I accidentally put petrol in my diesel car?
Do not start your car. If you have already started driving, immediately pull over safely and turn off the car. In either case, call a tow truck to transport your vehicle to your preferred mechanic for proper assessment and corrective action.
What happens to my diesel car if I accidentally misfuel with petrol?
There are three stages of misfuelling your diesel car with petrol. Stage one is the least severe, while stage three is the most severe.
Stage 1 – Pre-Engine Start Realisation
It occurs when you realise your misfuelling mistake before starting the engine.
This stage involves catching the error early, minimising the potential impact on your car. You must tow your vehicle to a mechanic to drain the contaminated fuel from your diesel fuel tank.
Stage 2 – Post Drive Discovery
It involves the realisation of misfuelling after driving a few kilometres.
At this stage, the damage of misfuelling has already occurred. Petrol is more refined than diesel, making it less oily. Diesel engines and fuel have been designed to rely on the higher oil content of diesel fuel to lubricate the diesel engine naturally. When petrol is in a running diesel engine, it causes damage by losing lubrication and eventually failing to operate.
Stage 3 – Full Effect of Misfuelling
Involves not realising the misfuelling error until after your diesel car has seized. This will result in catastrophic mechanic failure, with expensive repairs which will be time-consuming and stressful.
What are the costs involved when misfuelling a diesel car with petrol?
The costs associated with misfuelling your diesel car with petrol ranges across the stages of misfuelling.
Cost of misfuelling in Stage 1:
- Organising a tow service
- Mechanic fees for dropping and draining contaminated fuel
- Fuel disposal cost for environmentally responsible disposal
- Estimated cost: $200 AUD - $300 AUD
Cost of misfuelling in Stage 2:
- Organising a tow service
- Mechanic fees for dropping and draining contaminated fuel
- Fuel disposal cost for environmentally responsible disposal
- Potential replacement of low-pressure fuel pump
- Potential replacement of high-pressure fuel pump
- Potential replacement of injectors
- Estimated cost: $9,000 AUD
Cost of misfuelling in Stage 3:
- Organising a tow service
- Mechanic fees for dropping and draining contaminated fuel
- Fuel disposal cost for environmentally responsible disposal
- Replacement of low-pressure fuel pump
- Replacement of high-pressure fuel pump
- Replacement of injectors
- Potential full engine replacement
- Estimated cost: Over $12,000 AUD
It is important to note that these estimated costs can vary based on factors such as location, vehicle model, and specific repair requirements. Misfuelling incidents, especially in Stage 2 and Stage 3, can lead to significant expenses for repairs and replacing components in the fuel system and car engine.
Does my car manufacturer's warranty cover my misfuelling costs?
No, manufacturer warranties only cover manufacturing defects and do not cover misfuelling-related costs.
Does my car insurance cover my misfuelling costs?
It depends on your insurance policy. Insurance policies have specific terms and conditions, with some commonly excluding cover for misfuelling. It is recommended to check with your insurance company directly to understand what your insurance policy covers in such circumstances.
Compatible Manufacturers






























