The 500 mile break in period for vehicles is NOT for the engine, it's for the rear end gears.
OK, that's a funny HAHA.... In the old days, I do think it was necessary to take it easy on the valve seats. I don't think it's necessary these days. When's the last time you heard of a new car owner having to return it to the dealer because of valve seat problems during the first 500 miles? Now, brake problems...absolutely yes, problems do happen within the first 500 miles without proper break in. Rear end and transmission, not so much.Really? I didn't realize you had to properly seat the rings in the rear end gears.