i think tomorrow i shud add super with hi-octane and check the results...
btw today i replaced toyota petron engine oil with caltex havoline...plz anyone tell me..is it good based on their experience with Vitz (3 cylinder) ? becos i feel petron is the worst engine oil, due less mileage, long gear ratios etc.
also i changed my corolla's se saloon's shell engine oil with Caltex fully synthetic oil (costed 2250 for 4 liters) i feel the fuel economy of corolla reduced now...any ideas on this?