Old 8th Mar 2010, 13:54
  #15 (permalink)  
IO540
 
Join Date: Jun 2003
Location: EuroGA
Posts: 13,786
Yes, could well be.

However,

Compensation for higher MP usually means a lower RPM which is far more beneficial for any reciprocating engine.
I have not seen evidence for this. Can you find any?

Lower RPM does result in very definitely better MPG - some 10% better between 2200 and my max of 2575. But that's not the same thing as a proof of longer engine life. Also, some engines have a limit on the MP at lower RPM values.
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