I know that a lot has been made of this subject, but is it really necessary to "baby" your engine for the first 1000 miles (as the owner's manual states)? I don't think so.
I can see not doing any hard, heavy towing or pushing to the redline (which automatic trannys won't let you do anyway) for 500 miles or so, but beyond that what is really needed? Modern engine factory tolerances are very tight and I think the days of waiting 3,000 miles for the piston rings to "seat" are long gone. Modern machining translates into much less "wear" needed for break-in.
Keep in mind that John Lingenfelter modifies brand new corvettes, and runs them hard on a dyno and on a test track....and most these engines are straight from the showroom and have less virtually zero miles on them. Also, they come from the factory with Mobil 1.
I think the Toyota owner's manual is conservative....that's why it says "1000 miles" and not "721.5 miles." This is a rough estimate and will vary slightly engine to engine.
Please give me the other side of this argument. I would like to hear why, in your opinion, you need to keep the RPM's less than 3000 for the first 2000 miles.
Thanks, and great forum!