Well that is what Arriva gets for buying cheap, turbocharged buses for express and long distance work. If only they had've followed GNE's example and ordered B9TL's, they wouldn't be suffering from various problems. 6001 to 6007 have proven themselves well after three years of carrying full loads on 35 - 40 mile round trips encountering Old Durham Road out of Gateshead into Wrekenton and the pacey Washington Highway whilst being hammered by drivers battling through the traffic. On the other hand however, Arriva's 2 Cummins engined decker types (DB300 and E400) covering similar if not, slightly less demanding routes, have taken a hammering.