Piston rings are not fixed in place and can rotate microscopically . Cylinders do not wear evenly . An inch down the bore it may have wear for 120 degrees on the front and another inch down it may have wear 60 degrees on the rear . When I bore a block I can see odd wear patterns that vary from cylinder to cylinder . With the bore wearing erratically the rotation of the rings can vary .
Not saying anyone is right or wrong since there are many variables . Some motors live through 3 races and some live 300K miles . Some last 10K hours but still get used another 5K hours . Then you throw in low compression vs high compression and that changes the equation too .
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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