I have recently bought Toyota Vitz 2004 model approx 23,000 KM ( Without Full options ) 3 weeks ago. A week back I have changed its air filter ( the existing was almost useless ), oil filter and oil ( Shell Hilux, yellow BOX) and filled the tank with PSO's petrol ( I don't think it was hi-Octane rather premium )
Recently I am feeling that my car is not performing the way it used to a week back. I am experiencing very low vibrations at the steering handle. Previously the drive was very smooth, although it is still a smooth I feel that there is some thing wrong. I am not sure what it is. The engine sound is also seem slighter loud.
Is it because of the Oil change or petrol. In some pakwheel forums people have suggested to go for Hi-Octane or Shell super unleaded ? Also some body told me to use Havoline motor oil instead of Shell hilux. Is there any recommended motor oil for Vitz. I am sure that changing the air filter ( locally made using imported paper ) and oil filter ( the one used in other Toyota cars ) won't be the cause of this issue.
Thanks for reading...