1) Product introduction Dunba nano fuel-saving & maintaining fluid for limousine* ± is a fuel-saving environmental product, composed of nano-alloy polymer monomer and multifunctional additives, produced by technical equipment with our own intellectual property rights (patent no. Zl200810032849.1) and new scientific and technological achievement by china 863 high-tech project. 2) Eight functions Fuel economy saving fuel & engine oil5%-25% oil consumption saved; Strong lubrication improve lubrication greatly, reduce friction coefficient effectively, 80%-90% reductions in engine wear and tear; Engine protection wear and tear repaired dynamically, protect the power system permanently, engine life extended 2-3 times Fast start improves the initial rotation speed, easier to cold start in winter; Power strengthening restore the engine cylinder pressure. Power increased by 5%-35%; Noise reduction effectively reduce engine noise and vibration; Corrosion prevention prevent friction parts from corrosive pitting. Environmentally friendly improve engine oil burning, blue smoke and other conditions, reduce exhaust particles by 20%-30% and smoke emissions by 50%. 3) Four major features * Economic extend oil drain internals twice, save fuel effectively, reduce the repair cost * Environmental friendly effectively reduce exhaust particles and smoke emissions. * Fastening working environment improved in 15 minutes, noise and vibration reduced, and power enhanced. * Safe suitable for long-term use of various small vehicles, without any adverse effects or side effects. 4) two major breakthroughs Self-repair nano particle repairs the wear & scuffing surface automatically, then fundamentally achieving the engine maintenance; Three in one: maintaining, repairing and fuel-saving simultaneously. Boxes or customized.