Add some Octane booster if you need to. But I recommend the Lucas Fuel injector Cleaner Number one it costs less than 3 bux, Two it works really good. Cleans Injectors and improves gas milage, and three it costs less than 3 bux

Now octane booster is a bit more expensive but it will be like killing two birds with one stone as octane booster will also clean your injectors