As you all say there are good and bad in all Engines ,We ran Gardeners ,4 ,5 ,6 ,6lx ,6lxb .8lx,must admit had a few bad ones, but overall they done us well ,fuel was good oil leaks ,well show me one that doesnt ,then iwould think you were joking ,But will say iwas not impressed with the 6lxtc, no diffrent to the 6lxb for preformance ,we ran AEC ,Leylands ,they were ok ,a bit heavier on the fuel ,AECs head gaskets a few ,injector pipes by the thousands ,Leyland lots of headgskets ,overheating ,very heavy on fuel ,headgaskts on the 6oo not a easy job ,used to take longer to remove the manifold,and the other pipes than the heads them selves ,they all had good points and bad but we soldierd on kept us work, Volvo f 86 ,easey to work on they had to be gear boxes , turbos ,overheating and Headgaskets by the score, we only ran the one thank god ,yours Barry