Until recently i've not been running my car on Octane booster (import non mapped car), never really believed in them properly. For a few months now i've had a very sluggish throttle response at low rpm and a lumpy idle, I thought it was to do with a sensor problem. well the car stopped popping and banging a few days ago so i got a octane booster and threw in the tank, and within 20miles car felt so much easier to drive.
I've now run 2 tanks on octane booster and the car seems to be about 30-40% more powerful low RPM, idle's absolutly spot on, Exhaust sounds MUCH deeper and got my Pops and bangs back .
Scooby seems to love the stuff, AND I GOT BETTER MPG I now recommend Octane boosters to anyone with a JDM car.