As auto enthusiasts ourselves, we wanted to know the quality of fuel we were running and wanted be able to test it accurately. We were frustrated because current ethanol testers aren't full scale, they're hard to read, and if you get fuel on them, the graphics come off. So we set out to design a tester to meet our needs. Introducing the Fuel-It! Ethanol Content Tester. Test in just 3 easy steps Step 1: Add water Step 2: Add fuel Step 3: Shake Features and Benefits Freestanding with a flat bottom Unique design is easy to use and read Measurements that are taken in 2.5% increments Graphics that are guaranteed not to come off with normal use Full scale so if your fuel is E0, E10, E50, E90…no more guesstimating