Petrol in your diesel? Don't panic — and don't start the engine. Our mobile specialists will be with you in 30–60 minutes across the Scottish Highlands.
Putting petrol into a diesel car is the most common misfuelling mistake in the UK, with around 150,000 drivers doing it every year. Petrol acts as a solvent in a diesel fuel system, stripping away the lubrication that diesel provides to the high-pressure fuel pump and injectors. Modern common-rail diesel engines are particularly vulnerable because they operate at extremely high pressures — up to 2,000 bar — and rely entirely on diesel fuel for internal lubrication.
Don't start the engine. Call us immediately for the best outcome.
If you've already started the engine with petrol in your diesel tank, watch for these symptoms. Pull over safely and call us immediately.
Our simple 4-step process gets you back on the road quickly and safely.
Contact our 24/7 helpline. Don't turn on the ignition or try to start the engine — even switching to accessory mode can activate the fuel pump.
Our fully-equipped mobile unit arrives at your location within 30–60 minutes, whether you're at a petrol station, at home, or on the roadside.
We drain all contaminated fuel from the tank, fuel lines, fuel filter, and fuel rail using specialist extraction equipment.
We flush the entire system with clean diesel, replace the fuel filter if needed, and refill your tank so you can drive away safely.
Diesel fuel has natural lubricating properties that protect the high-pressure fuel pump and injectors. Petrol is a solvent — it strips this lubrication away, causing metal-on-metal contact inside the pump. The fine metal particles then circulate through the fuel system, scoring injector nozzles and blocking fuel filters. In modern common-rail systems, the fuel pump operates at pressures exceeding 1,600 bar. Without proper lubrication, the pump can seize within minutes, turning a simple fuel drain into a repair bill of £3,000–£7,000 or more.
If you've driven a short distance (under a mile) on contaminated fuel, there's a good chance a professional fuel drain and flush will resolve the issue without lasting damage. However, the longer you drive, the more contaminated fuel circulates through the system. After several miles, the fuel pump may begin to fail, sending metal debris through the injectors and into the engine. We always perform a thorough inspection after draining to assess whether any components need replacing.
Consider fitting a diesel fuel cap device that prevents a petrol nozzle from being inserted — products like the SoloDiesel cap are inexpensive and effective. Always double-check the pump label before fuelling, especially if you've recently switched vehicles or are driving a hire car. If you're at an unfamiliar station, take a moment to confirm the nozzle colour — green nozzles typically dispense unleaded petrol, while black nozzles dispense diesel in the UK.
When our technician arrives, they'll confirm the contamination, then use a specialist pump to extract all fuel from the tank through the fuel sender unit. The fuel lines, filter, and rail are then purged with clean diesel. The entire process typically takes 45–60 minutes. We carry fresh diesel on board so you won't need to find another filling station. Before leaving, we'll start the engine and monitor it for a few minutes to ensure everything is running smoothly. You'll receive a written report confirming the work completed.
Call us now for fast, professional fuel drain service anywhere in the Scottish Highlands. Available 24 hours a day, 7 days a week.
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