I have a 95 corolla with 205000 Km on it. Since last 3 months it is giving me an average of 10 km/L. Before it was giving me about 12Km/L. I have tried the wheel balancing, Alignment, Fuel injector service, Changed the Air filter but the avarage remains same. I had my timing belt/ waterpump changed also. Have been doing oil changes every 3 month. All the service was done at Toyota dealer.
What could be the reason for this poor fuel economy and how could I improve it?