Quote:
Originally Posted by freebeard
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By 1986, Ford Motor Company's,' thin', 'low-tension' piston-rings had:
1) Improved top-ring/bore conformity by 3%
2) 2nd compression-ring/bore conformity by 19%
3) Oil-Ring/ bore conformity by 400%
IMHO that 'blow-by' doesn't project much of a 'return' on a tribological radar screen with today's state-of-the-art in engine manufacturing technology, and probably hasn't for many decades.
4) That a manufacturer will currently warranty their engines for 10-years says something about 'engine wear.'
5) Many light vehicle engines have easily exceeded 300,000-mile service lives for over 35-years now, with only oil & filter changes performed at the recommended interval.