Spanjaard Diesel Injector Cleaner is a concentrated fuel system treatment developed specifically for diesel engines to restore injection efficiency and maintain consistent combustion quality. It is formulated to work while the engine is in normal operation, allowing cleaning action to occur without dismantling injectors or fuel system components. Unlike basic fuel additives that focus only on lubrication, this product targets injector cleanliness and fuel delivery accuracy, supporting smoother engine response and improved operational stability. It is suitable for both automotive and marine diesel engines where deposit-related performance loss is a concern.

• Injector Deposit Removal - Spanjaard Diesel Injector Cleaner is formulated to remove varnish and carbon deposits from diesel injector nozzles using detergent additives commonly applied in diesel fuel treatments. One 375 ml bottle is designed to treat up to a standard full tank of diesel fuel, delivering sufficient cleaning concentration to reduce injector fouling that typically develops after 5,000–10,000 km of operation.

  
  

• Spray Pattern Restoration - Cleaner injectors help restore correct fuel spray patterns by reducing deposit buildup at injector tips. Industry fuel system studies show that injector fouling can reduce spray efficiency by more than 10 percent, while detergent-based cleaning additives help recover atomisation performance, supporting more uniform fuel distribution in the combustion chamber.

  
  

• Combustion Efficiency Support - By improving injector cleanliness, the product supports more complete diesel combustion. Cleaner fuel delivery reduces unburnt fuel residues that contribute to inefficient combustion, helping stabilise engine operation and improving throttle response under load when compared to untreated fuel systems with contaminated injectors.

  
  

• Emission Reduction Effect - Improved combustion conditions contribute to lower formation of nitrogen oxides and particulate-related emissions. Industry testing indicates that injector cleaning can reduce incomplete combustion-related emissions by measurable margins, supporting cleaner exhaust output relative to systems affected by injector deposit buildup.

  
  

• Fuel System Protection - The formulation supports overall fuel system cleanliness while minimising the risk of sudden deposit release. The controlled cleaning action allows loosened deposits to be gradually combusted rather than accumulating in fuel filters, helping maintain normal fuel flow and reducing the likelihood of filter blockage during treatment.

• Automotive Diesel Engines - In automotive diesel engines, Spanjaard Diesel Injector Cleaner is added directly to the fuel tank before refuelling. The product mixes with diesel fuel and circulates through the injection system during normal driving. Cleaning occurs progressively as the vehicle is operated, restoring injector performance without workshop intervention.

  
  

• Marine Diesel Engines - For marine diesel engines, the cleaner is introduced into the fuel system according to tank capacity guidelines. During engine operation, the additive cleans injectors and fuel delivery components under steady load conditions. This supports reliable engine response and reduces deposit-related performance issues during extended running periods.

  
  

• Preventive Maintenance Use - As part of routine maintenance, the product is used at regular service intervals to maintain injector cleanliness. Application involves dosing into the fuel system prior to operation, allowing ongoing deposit control. Preventive use helps avoid performance degradation caused by long-term injector fouling.