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EFS Power Injector and Anti Pollution Save up to 10-30% gas, petrol or diesel!!! Product features EFS Power Injector and Anti Pollution Save up to 10-30% gas, petrol or diesel!!! For years, as EFS, we have tested devices that will provide you with fuel savings and increased engine performance. It works in all engines whether diesel, gas-mixed or fuel-injected. It can be easily installed and has an effective life of close to 100 thousand km.