Use VP Fix-It-Fuel if your lawnmower wont start (or any other piece of outdoor power equipment). Fix-It-Fuel is a single-use treatment for poor or non-running small engines damaged by ethanol-blended street gas. It cleans and rejuvenates the fuel system. As a result, your equipment will start more easily and operate in top condition. Fix-It-Fuel is an 89-octane gas. It's ETHANOL-FREE and pre-mixed with oil. Although it's a 50:1 mix, it works in any 2- and 4-cycle small engine application.Fix-It-Fuel cleans and repairs the fuel system without having to remove the carburetor or injectors, thus avoiding costly repairs and downtime. VP Fix-It-Fuel is best used as a pre-treatment before introducing ETHANOL-FREE VP Small Engine Fuel, which is designed for ongoing use to prevent ethanol-related problems from occurring in the first place.We design a technologically-advanced 40:1 mix, 50:1 mix, and Multi-Mix 40:1/50:1, which is great for people who own a combination of equipment that calls for both 40:1 and 50:1 fuel.