I like Shell Rotella T as it still has some of the old zinc in it. But it is very important to put in a bottle of zinc additive too. Do not idle the engine at all, set everthing so it fires up as quickly as possible, then immediately bring the rpms to 2000-2500 and KEEP it there for at least 20 minutes total running time. You might have to do that in 10 minute bursts if the car starts heating up, and the previously mentioned box fan helps a lot.

It might be overkill, but we always change the oil right after that initial breakin, although some people wait a while to drive it first. I figure oil is the cheapest thing you will ever put in a motor, so it can't hurt to change it right away. If you have a flat tappet cam, keep putting in zinc additive EVERY oil change. If you have a roller cam motor, no need to break it in, but I still like zinc additives.

Don