Dunkive 2 Pcs Reusable Ethanol Tester E85, Wide Mouth Fuel Pressure Testers Bottle, Gasoline Oil Analysis Kit for E85 Ethanol Levels to Maintain Peak Engine Performance, Clear Results in Minutes

Works surprisingly well. Have never used anything like it, was cool to watch the fuel level move in the water.

Simple, quick, accurate. Easy way to confirm what you are actually getting at the pump.

These are very nice and easy to read. Can’t beat them for the price!

Works as advertised.. easy to use, put in some water, fill with e gas, shake and read percentage... Only drawback is thag cap doesnt seal tight and leaks.when shaking... Plastic bottle deformed from sun when left in car in Texas sun.

I chose this kit as it used smaller amount of gas than many. I've been able to determine how much "non-ethanol" gas I need to pump first to clear the line at a station that uses a single delivery hose for delivery. Not that I appreciate paying $1 a gallon over premium 10% ethanol gas. It take 2 gallons get to what I'm buying. The bottles have a more graduated scale than many others too. I would have preferred glass over plastic for a longer reuse life. Ethanol gas is the worst thing ever for gas that is going to be left in small engines including generators. This kit was a small price to pay to protect my farm, motorcycle and vehicles that are stored more than driven.