The maintenance cost of Roadking can vary based on several factors.

Regular maintenance like oil changes, filter replacements, and tire rotations are necessary and usually not too expensive.

However, major components' repair or replacement can significantly increase the cost. For example, engine or transmission issues might require a substantial investment.

To keep the maintenance cost low, it's crucial to follow the manufacturer's recommended maintenance schedule. This includes timely servicing at specified mileage intervals.

Also, proper driving habits can contribute to reducing wear and tear on the vehicle. Avoiding aggressive driving, sudden acceleration, and harsh braking can prolong the life of various parts.

Another aspect to consider is the choice of maintenance service provider. Authorized dealerships might charge more but offer genuine parts and expertise. Independent garages could be cheaper but ensure they have qualified technicians and quality parts.

Keeping the vehicle clean, especially the undercarriage to prevent rust, is also important for long-term cost savings. Regular inspections can catch potential problems early, saving you from costly repairs later.

In summary, by adhering to the manufacturer's guidelines, driving carefully, and making smart choices about maintenance services, you can manage and minimize the maintenance cost of your Roadking.