Maxol unleaded petrol is 99.2 octane and is the same price as 95 octane in other fueling stations. It contain 5% bio-ethanol which is better for the environment and allows you accelerate faster. At constant speed it will also give you better MPG.
In a 200 hp engine this should give you nearly an extra 10 hp.
It is suitable for all petrol engines but I do not take any responsibility for any harm or damages. It is just a tip.
I use this product myself. I do recommend it but it's at your own discretion to use it.