[Rab]

I guess the difference is due to geographical location? The S.F. Bay Area is expensive.

The reason for the 500 mile “running-in” period, is that the new engine components don’t fit each other exactly, so have to wear into each other to “mate” for a close fit.

The manuals say that if you over-rev a new engine, it’s possible that the friction created in the new parts could cause the engine to overheat and sieze (and that could really spoil your day).

Modern engine parts are built to much higher tolerances than in the past so it’s not quite as necessary nowadays as it once was, but follow the advice (varying engine speed by changing gear) for safety and engine longevity.