Why Misfuelling Still Happens Despite Better Pump Labels in NZ

Every week, we collect vehicles from Z Energy, BP, Mobil and Gull stations across New Zealand where someone has put the wrong fuel in their tank. You'd think modern pump labelling would have solved this problem by now — but misfuelling is still remarkably common.

The main culprit is inconsistent labelling between different fuel station brands. While most stations now use colour coding (green for petrol, black for diesel), the actual layout and text varies significantly. Z Energy might position their diesel pump on the left, while BP has it on the right. Some stations use large bold text, others rely heavily on symbols. Gull's pumps look completely different to Mobil's.

This inconsistency creates problems when drivers visit unfamiliar stations or are simply running on autopilot during routine fuel stops. Your brain expects the diesel pump to be where it usually is at your regular station, but at a different brand it might be in a completely different position.

Rental cars and company vehicles make things worse. When you're driving an unfamiliar vehicle, it's easy to forget whether it runs on petrol or diesel, especially if the fuel cap doesn't have clear labelling.

Fuel companies are taking steps to address this. The petroleum industry has been working toward more standardised labelling, including consistent colours and clearer symbols. Some stations now have larger, more prominent fuel type indicators. However, with hundreds of independently owned service stations across New Zealand, implementing consistent changes takes time.

What to do right now

If you've just put the wrong fuel in your vehicle, don't panic — but absolutely do not start the engine. This is crucial. Starting the engine will circulate contaminated fuel through your system, turning a simple tank drain into an expensive engine repair.

Step away from the vehicle immediately and don't turn the key. Whether it's petrol in a diesel engine or diesel in a petrol engine, the solution is the same: get the fuel drained and flushed by a qualified workshop before any damage occurs.

Misfuelling happens to experienced drivers every day — you're not alone, and it's completely fixable when handled properly. Call EEK Mechanical on 0800 769 000 and we'll dispatch a tow truck to collect your vehicle 24/7, taking it straight to a certified workshop for professional fuel system cleaning.