I've seen three at the boneyards that were totaled that had nearly or well over 300K on the ticker... 309K on an '85 SD, 398K on an '84 SD, and an '83 with 282K. I know these were OE motors as the valve cover gasket had never been off for a valve adjustment (had OE part number still stamped on it) and leaked
everywhere.
Those are just the ones I've hit before the gauge clusters have been removed.
If you think these motors just crap out at 250K... I better sell my SD because it has 228K now and the SDL soon after as it's at 213K!
