The Critical First Steps
Putting petrol in a diesel car is one of the most common fuel mistakes, but acting quickly can prevent serious engine damage. Here's exactly what you need to do.
1. Don't Start the Engine
This is the most important rule. If you haven't started the engine yet, you've saved yourself thousands in potential repairs. Petrol acts as a solvent in a diesel engine, stripping away the lubrication that diesel provides. Starting the engine will circulate this contaminated fuel through your entire fuel system.
2. Don't Turn the Ignition
Even turning the key to the "on" position (without starting) can activate the fuel pump, which begins circulating the wrong fuel through your system. Keep the key out of the ignition entirely.
3. Call for Professional Help Immediately
Contact a wrong fuel rescue perth specialist like Rapid Fuel Rescue right away. We provide mobile wrong fuel services and can come to your location - whether you're at a service station, at home, or broken down on the side of the road - and drain the contaminated fuel safely.
4. Put Your Car in Neutral
If you're at a petrol station and blocking a pump, you'll need to move your car. Push it to a safe location - do not start the engine. Ask service station staff or other customers for help if needed.
What Happens If You Do Start the Engine?
If you've already started the engine with petrol in your diesel tank, turn it off immediately. The damage that occurs depends on how far you've driven:
- Just started: Minimal damage likely, but still requires complete fuel system flush
- Driven a short distance: Possible damage to fuel pump and injectors
- Driven extensively: Serious damage to fuel system components, potentially requiring replacement of fuel pump, injectors, and filters
The Fuel Drain Process
Professional fuel drain specialists like Rapid Fuel Rescue will:
- Safely drain all contaminated fuel from your tank
- Flush the fuel lines to remove any trace of petrol
- Replace fuel filters if necessary
- Add clean diesel fuel to get you back on the road
- Test start your vehicle to ensure everything is working properly
Prevention Tips
To avoid this mistake in the future:
- Place a reminder sticker near your fuel cap
- Use a diesel-only nozzle attachment (available at auto shops)
- Always double-check the pump label before filling
- Consider putting a bright tag on your key ring as a reminder
Cost Considerations
The wrong fuel rescue price for a professional fuel drain typically costs between $200-$500, which is much less expensive than repairing or replacing a damaged fuel system (which can cost $3,000-$10,000 or more). Learn more about wrong fuel in car symptoms to understand why quick action saves money. Some insurance policies cover misfuelling incidents, so check with your provider.
Need Help Now?
If you've just put petrol in your diesel car, don't panic. Call Rapid Fuel Rescue at 0416 692 022. We're available 24/7 across Perth and WA, and we can usually reach you within 30-60 minutes.
Frequently Asked Questions
How long does it take to drain wrong fuel from a car?
A professional fuel drain typically takes 45-90 minutes depending on your vehicle type and tank size. Mobile services like Rapid Fuel Rescue come to your location and complete the entire process on-site, getting you back on the road quickly.
Will my insurance cover putting petrol in a diesel car?
Some comprehensive insurance policies include misfuelling cover, while others offer it as an optional add-on. Check your policy documents or contact your insurer directly. Even if not covered, professional fuel drainage is far less expensive than engine repairs from driving with wrong fuel.
Can I dilute the wrong fuel by adding correct fuel?
No, this is not recommended. Even a small amount of petrol in a diesel system can cause damage. The only safe solution is complete drainage and flushing by professionals. Adding more fuel won't solve the problem and may make it worse by further contaminating your system.
What if I only put a small amount of petrol in my diesel car?
Even small amounts of petrol can damage a diesel engine's fuel system. The amount matters less than whether you've started the engine. If you realize the mistake before starting, professional drainage should prevent any damage regardless of the amount.
How much diesel can I safely put in a petrol car?
There's no "safe" amount of wrong fuel. However, diesel in a petrol car is generally less damaging than petrol in a diesel car. Regardless of the amount, you should not start the engine and should call for professional fuel drainage immediately.
Can I drain the fuel myself to save money?
While technically possible, DIY fuel drainage is not recommended. You need specialized equipment to completely drain the tank and fuel lines, and improper drainage can leave contaminated fuel in the system. Professional services ensure complete removal and proper disposal of contaminated fuel, and they have insurance coverage if anything goes wrong.
