For my last 2 new cars, '03 Mazda B4000 & '03 Mazda MPV I broke them in with a combination of running easy, varying speeds between 30 and 50 and then running heavy throttle up then backing off throttle and building vacuum as I coast down. I didn't let the engine lug and this is a problem in the B4000 due to how the trans is tuned. After 18,000 on the B4000 and 30,000 on the MPV no oil usage at all in 5000 OCI, gas mileage was better on the B4000 than rated and the MPV is getting as good as anyone on the MPV forum. I didn't run them like I stole them but did run them up 3500 rpm or so, maybe 4000.