STP Emissions Reducer for diesel engines. Additive to help reduce emissions and facilitate passing inspection tests.

STP® Diesel Treatment is designed to help reduce fuel consumption by keeping the fuel intake system clean of harmful deposits, while reducing emissions, smoke and noise.

Cleans diesel injectors in just one tank, restoring power and smoothness to the engine.

STP Diesel Particulate Filter (DPF) Cleaner. Cleans and regenerates diesel particulate filters, removing soot and helping to reduce emissions.

Reduces smoke, oil consumption and engine noise, protecting against wear and improving performance.

STP Complete Diesel Fuel System Cleaner. Cleans and protects the entire fuel system, restoring engine performance and reducing emissions.

STP additive for treating diesel engine oil. Additive that reduces wear, friction and oil consumption, offering extra protection against heat and deposits in the engine.

STP additive for treating petrol engine oil. Additive that reduces wear, friction and oil consumption, offering extra protection against heat and deposits in the engine.

STP Emissions Reducer for petrol engines. Additive to help reduce emissions and facilitate passing inspection tests.

STP® Petrol Treatment is designed to help reduce fuel consumption and emissions by keeping the fuel intake system clear of harmful deposits.

Cleans fuel injectors in just one tank, restoring power and smoothness to the engine.

Reduces smoke, oil consumption and engine noise, protecting against wear and improving performance.