I've just started using Pre-MIX in my 13B-MSP. Smoother feel almost immediate after the 1st fill-up. I'm putting in bout 200ml (believe it's a US quart) for every 50 litre tank.
Like lennon said RM 60 for a 1 litre bottle to last 5 fill-ups.
Did anyone tried to DIY a cool air vent before?
like those advertise in newspaper. It is suppose to cool down the cabin tempreture when the car is park under the hot sun.