You need to use good fuel in the car, like shell fuel, none of this supermarket cheap fuel or even esso fuel, you'll feel the difference, next time use v power shell, you'll feel the difference straight away, I know there's people on here that would say there is no difference in supermarket fuel it's all the same etc, put it this way, you buy a shirt from primark and it may last you 2 weeks to a month, you buy an Armani shirt and it will last you years, there is a difference