Here's why it's so challenging and what options you have:
* Complete Separation is Near Impossible: Diesel and petrol are both hydrocarbon liquids that mix readily. Simple methods like siphoning won't separate them completely; you'll just end up with a fuel mixture that's even worse for your engine.
* Risks to the Fuel System: Running your engine on a significantly diesel-contaminated fuel mixture will damage components like the fuel pump, injectors, and catalytic converter. The damage can range from reduced performance to complete failure.
* Environmental Concerns: Improper disposal of contaminated fuel is illegal and harmful to the environment.
Instead of trying DIY removal, your options are:
* Professional Fuel Draining and Cleaning: A mechanic or recovery service is best equipped to handle this. They can safely drain the contaminated fuel, flush the fuel system, and replace the fuel filter. This is the most reliable solution to avoid further damage.
* Fuel Treatment (Limited Use): Some fuel additives claim to help with minor contamination, but these are only effective for small amounts of diesel and shouldn't be relied upon for significant contamination. Even then, they might not be enough, and you risk causing more issues by continuing to run a potentially damaged system.
* Tank Replacement (Extreme Cases): In severe cases with large amounts of diesel contamination, tank replacement might be the only option. This is a costly solution.
In summary: Avoid attempting to remove diesel from your petrol tank on your own. Contact a qualified mechanic or recovery service as soon as possible to minimize damage and ensure proper fuel system repair and disposal. The cost of professional help will be far less than the cost of repairing significant engine damage.
