I own a 2009 Honda City. Maintenance costs around 3,700 to 4,000 pesos every 10,000 kms. Casa maintained and I use Honda synthetic oil. I used to have a 2006 Avanza, also casa maintained with Toyota synthetic oil. 10,000 km service interval. Cost is also 3,000 to 4,000 pesos. So while your car is under warranty and casa maintained, cost is about the same. If you have it serviced outside, then Toyota parts will be less expensive.