That's the bottom line right there, so why worry about something you can't control anyway....In a Volt the ICE range extender is pretty well managed by the computer systems and you really do not have that much control over engine rpm...
lol too true my friend too true, i suffer from the fate....I've read that it's important to frown periodically during the first 500 miles. Otherwise the Volt grin sets itself permanently on your face. Alas, I was told too late.
(AZ EV Driver nailed the real answer.)
Congratulations, Bullyveldt! You have found the secret source of 90% of the expert knowledge in this forum,i searched the owners manual under break in there is a paragraph. It states the volt has no special break in requirements and can be driven normally right away.