Luke-Avfc

Can anyone tell me if i can use octaine booster on a mapped car ? I used to run optimax an booster before the map and i cant remember if i had booster in the tank when it was mapped nearly a year ago at scoobyclinic. Ive not run the booster since and the car felt its quickest on the drive back from the clinic but i just put that down to the fact i had new power on tap. I recently had it R/Roaded at the clinic an was told it was running slightly lean.Could that be down to the lower octaine ? I dont no what to do in regards to using the booster again any help would be great.

Luke-Avfc

Anyone ??????????????????