Well the petrol light came on the other day and i was near my local shell garage, so thought might aswell go there. Popped in, went togo get the normal 95 Ron unleaded but then a big red sticker caught my eye, thought oow shiney, looked over and it was shell's 99 Ron super unleaded, why not, so picked the nozzle up and chucked 25 quid in the tank. Paid and off i went, at first i thought well whats the difference but after a few mile the car had obviously picked up the change in fuel and wow, its like a new car seriously. I always thought the s3 was missing something, felt a bit slack off boost etc but now, its just sooo much smoother and powerful, its got constant power even off boost and well when the boost kicks in its like an animal. Raced a 150 cdti astra last night, he even got a head start as i didnt realise we were racing haha and by the time i got through first and second i was 3 car lengths and off haha and only just blinked, honestly i cant tell you what its done for the car, new MAF and i think itll be running better than when it left the factory, apart from the knocking suspension that is (not my fault, was a stupid b*tch who couldnt drive).