Rev-X Super Tester Flex Fuel Ethanol E85 to E10, E15, E20, E25 Test Kit

I have my gti tuned on e85 and use this tester for when I want to run e85 instead of 93 it works very well and is super simple all you need is a little water. I would recommend a funnel for when you are putting the gas inside of it because the bottle is super super small.

Simple but effective. Provides the exact percentage of available ethanol (corrosive alcohol) in gasoline so that preventive and neutralizing measures can be taken to protect gasoline-powered equipment.

Thanks to Amazon I got my money back otherwise it would have been £25 down the drain. Some Einstein at their warehouse decided to put an adhesive product sticker right over the read off label which itself is a VERY poorly adhered sticker onto what is a VERY poor quality plastic bottle. Seriously You are better off just getting a 100ml glass measuring cylinder, the type used in school chemistry labs, and using one of those. I reported this to the seller and whilst they apologised there was no offer of a replacement or refund so once again thanks Amazon.

Take your time for accuracy using this product, meaning don't be in a rush.

excellent