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 - Buying your first tractor: The People You Buy From - by Chris Pratt. If you are a first-time buyer, chances are that you are likely to take the word of the seller on things. This is where the problems start... You have reviewed your implement needs and determined the size of machine that will fit the bill and even made a list of the most desirable models. You checked on the availability of a 3-point hitch for the machines on the list and advertised in your local classified paper with so
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