7 Ways to Avoid Putting the Wrong Fuel in Your Car

<p>Putting the wrong fuel in your car is far more common than most people realise. It happens to experienced drivers, careful drivers, and people who have driven the same car for years. The good news is that almost every misfuel is preventable with a few simple habits, and if it does happen, help is available around the clock.</p><p>The most important rule, always, is this: do not start the engine. If you have put petrol in a diesel car or diesel in a petrol car, turning the key or pressing the start button circulates the contaminated fuel through the system and can turn a straightforward recovery into a much more involved repair. Leave the engine off, move the vehicle to a safe spot if you can do so without starting it, and call for help.</p><p>Here are seven practical ways to avoid the mistake in the first place.</p><p>First, learn the pump colour codes. In the UK, unleaded petrol is almost always green, while diesel is black. This is the opposite of many other countries, which is exactly why so many visitors and new arrivals get caught out. Before you lift the nozzle, read the label on the pump and the label on the filler flap rather than relying on memory.</p><p>Second, check the label inside your fuel filler flap. Most modern cars have a small sticker or embossed marking showing the correct fuel type, and many diesel vehicles also display a warning near the cap. Make this your final check every single time.</p><p>Third, fit a misfuel prevention device. Diesel cars can be fitted with a misfuel cap or guard that physically prevents the narrower petrol nozzle from entering the filler neck. These are inexpensive, widely available, and particularly worthwhile if you share a car or regularly switch between petrol and diesel vehicles.</p><p>Fourth, build a habit of saying the fuel type out loud before you fill. It sounds simple, but a quick verbal check — "diesel, black pump" — interrupts the autopilot that causes most misfuels. Pair it with a glance at the nozzle colour and the pump label.</p><p>Fifth, avoid distractions at the pump. Rushing, talking on the phone, or dealing with children in the back seat are common factors in misfuel incidents. Take a moment to focus before you start filling.</p><p>Sixth, be extra careful when driving an unfamiliar vehicle. If you have borrowed a car, hired a van, or been given a courtesy car, do not assume it takes the same fuel as your own. Check the filler flap and the handbook before you reach the forecourt.</p><p>Seventh, watch out for rental car risks. Rental and hire vehicles are a leading source of misfuels because drivers are unfamiliar with the car and often tired after travelling. If you are hiring a car in the UK, confirm the fuel type at the counter and check the filler flap before you drive away. Remember that rental companies' roadside assistance is a separate service from the workshop recovery that actually repairs the vehicle.</p><p>What to do right now if you have already misfuelled: do not start the engine, and do not attempt to drain the fuel yourself. EEK Mechanical dispatches a tow truck to your location — whether that is a forecourt, roadside, home, or car park — and collects your vehicle for transport to a GBIFDA-certified workshop. Manufacturer-spec fuel system recovery is completed at the workshop, never at the collection point, so your vehicle is handled safely and correctly from start to finish.</p><p>Costs vary by vehicle, tow distance, after-hours timing, and the severity of contamination, and every recovery is fully itemised. You can review our <a href="/rate-card">rate card</a> for transparent pricing, and our <a href="/terms">terms of service</a> explain exactly how the process works.</p><p>If you have put the wrong fuel in your car, call <a href="tel:08082806346">0808 280 6346</a> now. We dispatch a tow truck 24/7, collect your vehicle, and arrange manufacturer-spec fuel system recovery at a certified workshop so you can get back on the road safely.</p>