Evidently the B10 and B50 numbers are estimates of engine life provided by the manufacturer. They are based on the engine design (distance of piston travel per mile and other inherent factors). Whether or not the "B" numbers hold up when hundreds of thousands of engines are on the road is another story. I read that Ford assigned a similar B50 number to the 6.0 as they had on the 7.3. The only problem with their engine life estimate was that few if any 6.0's will ever make it to the B50 mileage due to fuel system and other problems. Many 7.3's actually reached the estimated engine life, because the fuel system and the rest of the engine were decent.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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