Permeation barrier fuel tank

A permeation barrier fuel tank (10) for a vehicle includes a tank shell (12) having a wall formed from a plurality of layers (30,32,34,36,38,40). The layers (30, 32,34,36,38,40) include at least an inner layer (30), an outer layer (38), a fuel permeation barrier layer (40) disposed between the inner layer (30) and the outer layer (38), and an amorphous carbon layer disposed adjacent the inner layer (30).