Modern engines are made to very exacting tolerances that could not easily be met with older machining technology. I have read that newer engines with 100K miles still have much closer tolerances than older engines had when they were brand new. Add in fuel injection not washing down the cylinder walls and contaminating the oil and you can get some long life out of an engine if all goes well. I'm young at 45 and I can remember when any car or pickup was considered worn out at 100K miles, now they are just getting broken in! Synthetic oil is great for a race engine or where the oil will be pushed to heat limits but not really needed in a normal engine. Check what the manufacturer recommends.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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