Engine break in for new 350

[leftybass209]

Always default to what the builder says. If he warranties it, it'll be covered.

If not, nobody who gave you a suggestion is also going to give you the money to fix it.

Breaking in a motor whether it needs to or not, is such an easy thing to do. The cost of an oil change and 20 minutes of your time you'd already be spending dialing in the motor regardless.

I don't see an avenue where it doesn't make sense either by warranty, by rule, or by piece-of-mind