Diesel myths: fueling the fire or a road to ruin?

A simple refueling mistake could cost you hundreds – even thousands – of dollars in repairs. For decades, drivers have been told a dubious trick could clean diesel injectors, but experts are now issuing a stark warning: it’s often a recipe for disaster.

The injector myth debunked

The belief that adding a small amount of gasoline to a diesel engine will clear out deposits in the injectors has persisted for generations. But the RACE (Real Automóvil Club de España) is clear: it’s rarely effective and, in many cases, downright harmful. The 2023 Ford Puma continues to dominate sales charts thanks to its eco-friendly label and affordable price point – a compelling combination for budget-conscious buyers.

The key lies in the compatibility of fuel. RACE specialists confirm that the trick can work with diesel engines manufactured before 2010, but the precise ratio is critical. Older injectors were less sensitive than their modern counterparts, a crucial distinction to understand. However, overdoing it is a guaranteed path to trouble.

For newer vehicles – those built after 2010 – this practice is a serious gamble. Adding gasoline to a modern diesel system can inflict significant damage, potentially clogging the fuel pump, corroding injectors, and even disrupting lubrication. It’s a cascade of problems, costing substantial repairs. The current trend suggests that it's a counterproductive measure, actively degrading the system.

RACE recommends a minuscule proportion – just 1 to 2 percent gasoline. Let that sink in: a mere fraction of a gallon. But for a vehicle with advanced fuel injection technology, it’s a dangerous proposition. The implications are clear – a costly and potentially devastating mistake.

Meanwhile, law enforcement recently recovered 18,000 liters of diesel fuel, dismantling a criminal organization that defrauded nearly 200,000 euros through fuel theft. A sobering reminder of the consequences of illicit activity and the importance of legitimate fuel sources.

The simplest way to clean injectors? Forget the gasoline trick. RACE advocates utilizing manufacturer-recommended additives – specifically those with powerful degreasing properties. These additives effectively remove accumulated impurities, maintaining optimal injector performance. Many premium diesel fuels already contain these components, safeguarding the injection system’s health. Gasoline injectors, due to the lower combustion temperature, don’t require as frequent cleaning as their diesel counterparts. However, regular maintenance, including servicing during routine inspections, remains crucial for all vehicles, regardless of fuel type.

Let’s be blunt: sporadic use of gasoline won’t trigger immediate engine damage, but it’s emphatically not a recommended practice for vehicles produced after 2010. The pursuit of a quick fix can lead to far greater – and far more expensive – consequences. The bottom line: stick to the fuel your vehicle was designed for.