For both the Pacifica gas engine and Pacifica Hybrid engine, the break in periods are the same. Here's what the manufacturer has to say:A long break-in period is not required for the engine and drivetrain (transmission and axle) in your vehicle. Drive moderately during the first 300 miles (500km).After the initial 60miles(100km),speeds up to 50 or 55mph (80or90km/h) are desirable. While cruising,brief full-throttle acceleration within the limits of local traffic laws contributes to a good break-in.