So true. One common fail was the turbo oil supply inlets had screens, they would start to coke-up & starve the turbo for oil, most just remove them. Besides the head gaskets leaking oil at the bottom-rear, they can also start using oil at a rate of 1qt./mi.+, Subey says that's 'normal'...but the avg motorist almost never checks the oil between change intervals anymore, hence many blown-up mills. The main oil gallery feeds the driver head near the front, the passenger near the rear, by the time the pass. head tries to get the oil back up to the front, the pass. front cam journal is the 1st thing to seize.