NANO fuel additive, a super-concentrated environmentally multi-functional fuel additive,which is developed with liquid nano-technology, that is an "all-in-one?power booster, fuel saver, emissions reducer, engine protector and combustion chamber deposit cleaner. It is the fourth generation of streamlined fuel additive in the word. Efficacy: a) Reducing consumption of fuel 10%-20%. b) Reducing harmful matt including CO,HC, and NO,etc.40%-80%.It is propitious to protect the environment. c) Increases vehicle's power 20%-28%, and reduces/eliminates engine operation noise and makes driving smoothly. d) Effectively inhibit or eliminate carbon deposits in combustion chamber including the spark plug, fuel spray nozzle, gas inlet valve, gas exhaust valve etc. e) Reducing requirement of octane for gasoline engine 4-6. f) Effectively cleaning colloid and impurities in system of fuel, so the system of fuel will be more cleaning. g) Makes users to have less maintenance costs, extending engine's life. It works well for new and old engines, in all fuels and in all climates and seasons. No engine modification is required.