The goals of this study are: to explore the efficiency of fuel pumps by modifying the friction surfaces with fluor-oligomeric film; to analyze the peculiarities of interaction between fluor-oligomer and iron; to investigate the influence of fluor-oligomer on the corrosive properties of iron. After processing the surface of precise friction pairs with fluor-oligomer the average cyclic delivery of fuel pumps increases up to 18 %, and increased efficiency persisting 40 operation hours. The fluor-oligomer lowers wear in comparison with control version, especially at higher rotation speed. The positive effect is explained by chemical interaction between iron and fluor-oligomer film that was proved by the data obtained by Mossbauer spectroscopy, X-ray diffraction and electrochemical technique. Even extremely thin fluor-oligomeric films can sufficiently improve iron resistance to corrosion.