Well with dino oil you have breakdown that is much less with synthetics as they do a much better job of resisting high temps. Full flow oil filters of the types used in cars and mowers are about 20 microns as the smallest particle that they'll catch. And the tricky advertising of "our filter gets 99% on multiple passes" and all that hoopla is still referencing 20 microns. Read the referenced test method.
To get smaller you have to go to a bypass filtration that traps down to around 5. Since the media is very restrictive, unless you have a 5 gallon bucket sized filter (exaggeration obviously), you can't pass the 5-20 gpm of oil your engine needs for lubrication. That's how OTR trucks get long change intervals and million miles between overhauls. They have a small bypass line that goes to this filter and over time all the oil in the engine eventually goes through it.
Maybe BS has some sort of time table on a new engine, and improved dust collecting, synthetic oil specified to maintain the warranty and all and figure that you'll sell or trade the thing before the engine dies because you didn't change the oil. I know when I used to use dino oil in my mowers, I'd have to change it 2-3 times a year. With syn. I do it once.
Guess they'll let out some specifics sooner or later.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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