Help me debunk some myths and misconceptions:
First, I have been told that the life of an engine at redline under load
(i.e. on the road and not on a test stand) is measured in minutes, say
18-20 minutes at most.
The argument was that the compression rings "bang around" and wear out.
Can this be true? I expect shorter life at high
revs, but this seems a bit extreme to me, especially for a modern DOHC motor.
Second, I was recently told that using inferior grade (i.e. not this
company's $8/qt stuff) motor oil will cause deposits to build up on the
exhaust valves. I can understand how combustion products will deposit
on the valves, but how in the world does the oil get there?
Thanks,
Wink Lund
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