Ive only used optimax in my car and i have had it for 4 weeks. in the last week or so the car is running 20% lower than its normal and gears are hard to change in high cam. Does the quality of your petrol affect the gearbox?
Tiger i do think you are getting ripped off. I nearly got the car for 35 with sunroof, rear and front grill, mats and all and they were going to trade in my 99 levin for 25g. Althought it was fully kitted up with about 7000 dollars spent on it