I would use the recommended oil but in mineral oil for the first 15K - 20K miles.

Change oil after 600 - 800 miles ( as new metal components rub against each other, fine metal filings result ). Then change again at 3000 miles.

During the first 3K, drive carefully - taking off slowly, keep RPM around 2500, and avoid hard braking. This is the breakin period for the mechanical components in the engine.

After 3K, u can drive normally. Do ur regular oil changes and after about 15K switch over to synthetic oil. Changing to synthetic from the go would arrest the smooth break in of metal components in the engine.

The benefits of the breakin period come later in the car's life when u have less mechanical problms and oil/fuel leaks.