1990 Ford F250 4x4, ZF5, L/S 4.10, N/A 7.3L Diesel, 568,808km/377,497 miles, still on the original clutch!
1989 Ford F150 300-6, C6, 2.73, 152,000km/95,000 miles.
1987 Ford E350 26ft. Motorhome, N/A 6.9L Diesel, C6, 3.54, 289,000km/180,000 miles.
1985 Ford E350 Ext Van, 6.9L Diesel, C6, 4.11, 677,000km/425k miles
I've had fantastic luck with the 6.0s. Just blank off the freaking awful EGR cooler, install a better downpipe, keep the cooling system flushed, and oil changed, and they will live a very very long time. I've got one with 230,000 that I have done nothing but regular maintenance on since I bypassed the EGR cooler.
I had one that was puking coolant, so i did gaskets and ARP studs, and remove the EGR cooler, and its a very happy truck now as well.
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