This moderately oxygenated product is a superior blend for use in BRACKET STYLE, DIAL-IN and INDEX drag racing applications. It provides consistent performance in a multitude of weather conditions and is compatible with moderate power adders. For use in small and larger cubic inch, naturally aspirated and EFI 8-cylinder engines with varying compression ratios ranging from 11:1 to beyond 15:1. EX 115 appeals to the racer desirous of narrowing their ET window. And no need to drain your fuel system between races/events.