Abstract: A flexible tubular conduit for fluid flow therethrough, particularly adapted to form a portion of a drain line for returning lubricating oil from a turbocharger housing to the engine lubricating system of an internal combustion engine on which the turbocharger is used, the conduit comprising an integral tubular wall having inner and outer adhered coaxial layers, the inner layer defining the inner wall surface in contact with the fluid flowing therethrough and formed of a used lubricating oil resistant silicone rubber and the outer layer comprising at least one and, preferably, at least four adhered, coaxial lamina formed of woven aromatic polyamide, reinforcing fabric, such as Nomex, coated with a high modulus, high strength silicone rubber.