Boyolali to Pekalongan bus with Joglosemar Shuttle Bus

Tickets start at around €11 compared to roughly €16 in fuel and tolls — a saving of about €6. The journey takes 3h 12m versus 2h 19m by car, so you'll arrive a bit later, but you can use the time productively rather than spending it behind the wheel. No parking to sort, no fuel stops, and most coaches have Wi-Fi and power outlets.

Driving is worth considering if you're on a tight schedule, travelling as a group (where fuel costs split several ways), or want the flexibility to stop along the way.