Tis the difference between light duty and heavy duty applications.
My truck in round numbers has 160,000 miles and 4,600hrs. Doesn't burn oil and no discernible power loss when towing. It has spent most of it's life making an average of 45HP out of it's potential 300HP.
150hrs sounds awful short even at redline and full throttle. Those engines must have been souped up and maybe even ran on regular gas when they should have had premium.
You can take a GM marine crate engine and wail the tar out of them at full throttle racing around and towing. As long as they don't knock, have clean air and some oil in them. They will run for thousands of hours.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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