Most cars will perform acceptably on 87 octane gasoline. Fuels with octane ratings of 89 to 94 resist the tendency to knock, but do not necessarily result in more power or better overall performance. Consult your owner's manual for information on choosing the correct fuel for the model and engine configuration in your car or truck. According to the FTC, buying gasoline with a higher rating may not improve engine performance or increase mileage to justify the increased cost. Don't be fooled by the product names like premium, platinum, gold, extra, special, etc.
Retailers are free to use any name to market their product.
These creative names, like special or high test, don't usually mean a lot. In making value comparisons, always refer to the octane sticker. Another consideration in making value comparisons is the additive packages. Major marketers put additives in their fuels to improve performance. While all fuels contain some additives, premium grades may include additional additives that may help your engine with an added cost.