Duramax was tested under hard use and given a "B10" rating of 220,000 miles. It was not B50 tested. That means 10% failed by 220,000 miles and 90% made it that far with no major repairs.
For comparison, here are some "B" ratings on other engines.
Ford (Navistar)Max-force 7- 6.4 liter. B10 262,500 miles (6,730 engine hours). B50 - 375,000 miles (9,600 engine hours).
Cummins 5.9 diesel has a B10 rating of 210-250,000 miles (6,400 engine hours) and a B50 of 350,000 miles (9000 engine hours).
Isuzu 6H diesel - B10 durability rating of 410,000 miles (10,000 engine hours)
International DT466E has a B10 of 300,000 miles (5200 engine hours), and B50 of 450,000 miles (11,500 engine hours).
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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