the present invention relates to a multilayer tube comprising , in its radial direction from the outside inwards : a polyamide outer layer ; an inner layer of a composition comprising , the total being 100 %, 5 to 30 % by weight of a blend comprising : a polyethylene carrying epoxy functional groups , an impact modifier chosen from elastomers and very low - density polyethylenes , the said impact modifier being completely or partly functionalized ; 95 to 70 % by weight of a blend comprising : a fluoropolymer , a functionalized fluoropolymer , the proportion of being between 1 and 80 % by weight of +, the layers being successive and adhering to one another in their respective contact region . the inner layer is the layer in contact with the fluid being transported . the layer may be conductive . it is also possible to place a polyamide layer beside the layer , which layer becomes the inner layer . the tube of the present invention has a very low permeability to petrol , particularly to hydrocarbons and to their additives , in particular alcohols such as methanol and ethanol , or even ethers such as mtbe or itbe . these tubes also exhibit good resistance to fuels and to lubricating oils for engines . this tube exhibits very good mechanical properties at low temperature and at high temperature . the invention also relates to the use of these tubes for transporting petrol .