Tommy Posted October 2, 2017 Report Share Posted October 2, 2017 Recently bought a brand new car and its break-in calls for a very gentle approach - avoid RPM >4000 for the first 500 miles. This is very much the opposite of what we do to our new engine. I am curious why the difference? Quote Link to comment Share on other sites More sharing options...
KSMooniac Posted October 2, 2017 Report Share Posted October 2, 2017 I suspect it has to do with air-cooled versus water-cooled and the associated differences in tolerances.Sent from my LG-US996 using Tapatalk Quote Link to comment Share on other sites More sharing options...
EricJ Posted October 2, 2017 Report Share Posted October 2, 2017 Much tighter tolerances in modern automotive engines than typical reciprocating aircraft engines, and different materials and assumptions about the oil chemistry. Basically, there's not much in common between a modern automotive engine and an ancient air-cooled aircraft engine except that they're four-stroke Otto cycle and burn gasoline. 1 Quote Link to comment Share on other sites More sharing options...
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