Im with viking fan my 2000 ford sd 250 has 192000 miles with very few problems getting ready for the second tuneup (every 100000 miles)replaced alternator at about 160000 and replaced 3 coil packs over the last 8 years which was my fault for power washing the engine down which is a no no as i found out later.Very good engine my neighbor the ford mechanic says 300000 miles cause hes seen it already out of these motors and he wouldnt bs me.