RON - I would recommend you read this. Personally, I think you're a victim of marketing. We do not drive performance cars and, even then, you're only likely to notice a marginal difference on a track!
http://www.whatprice.co.uk/petrol-price ... -fuel.html
I'd highlight these statements:
"...unfortunately many car owners have a firm belief that higher octane fuel improves car mileage and performance. To cut the long story short, higher octane neither improves mileage, nor acceleration. If you want to save on your motoring costs, then instead of going for high octane, use regular petrol. Typically High octane is sold at a price higher in the range of 10% to 14% than regular petrol. High octane is just a cleaner version of regular unleaded petrol and has nothing to do with performance....In the UK premium high octane fuels such as Shell V-power and BP Ultimate are available. The higher the octane level, the higher the cost."
Higher octane gasoline delivers more engine power - Absolutely not. Higher octane fuel are not designed to give more power. Many people have taken this for granted. Check up your car's fuel ignition system and electric system. Repairs to anyone of these could noticeably increase engine power, yet have nothing to do with high octane.
Higher octane improves car mileage - Typically all cars are designed to run perfectly on regular 87 octane petrol. As a result switching from lower octane to higher octane would not result in improved mileage.
Higher octane leads to better engine startup - Higher octane does not lead to faster engine startup. As long as you take good care of your car, regularly change its lubricating oil, and tune up every month or two, you need not to switch to more expensive high octane fuel for a faster engine startup.
It is a refined product so it is a better fuel - Once again, as opposed to the popular myth, further processing of regular unleaded gasoline leads to different blends of hydrocarbons that burn slowly as compared to regular octane fuel. There is no link between refining regular petrol and using it as a better product for improved car performance.
Higher octane is used for expensive luxurious cars - Luxurious & expensive car owners owning Pajeros, Land Cruisers, Lamborghinis, Ferraris, Porsche's and various other sports/luxury cars generally hold a notion that High octane is required to run their vehicles properly on road. According to the analysis conducted by the experts & analysts at Automobile Association of America (AAA) only 5% of vehicles sold in America require premium gasoline only. However if we compare the figure required with figure generated, 20% of fuel sold in the US is premium gasoline i.e. high octane.