is this one time use? do I need to add other things other then fuel and water before the test?

You can use it many times. It’s really easy to use Just add water to the water line mark the fuel on top of it. Shake for about 10 seconds and then let stand for about 10 seconds. You will have your result. Nothing else needed for this test.

How can a plastic bottle with just simple graduations cost so much? It cannot cost more than $0.35 a piece to make this thing.

The graduations are written on tape and then stuck on the bottle. I can see a price tag of maybe $3.95 not $14.95 like I paid. But it does work.

does this test diesel fuel?

No, it tests for alcohol percent in gasoline.

What if the gasoline your testing has sta-bil 22264 360 protection in it? will this still work?

I honestly can't say but I would think so. Google your best bet for a question like this

Rev X Super Tester Flex Fuel Ethanol E85 To E10

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Description

🛠️ Know your fuel, protect your ride—because guessing costs more.

TRUSTED BY THOUSANDS - 4.7-star rating from over 2,200 users proves reliability and peace of mind.
INSTANT ETHANOL DETECTION - Get precise ethanol levels in just 5 minutes—no guesswork, no delays.
ENGINE PROTECTION ASSURANCE - Identify harmful ethanol concentrations before they damage your flex-fuel vehicle.
COMPACT LIGHTWEIGHT DESIGN - At just 32g and pocket-sized, it’s the ultimate on-the-go fuel guardian.
COMPREHENSIVE FUEL COMPATIBILITY - Tests E85 down to E10, E15, E20, and E25 blends—know exactly what’s in your tank.

The REV X Super Tester is a compact, easy-to-use ethanol testing kit designed to quickly measure ethanol content in gasoline blends from E10 to E85. With a fast 5-minute test time and precise results, it empowers flex-fuel vehicle owners to avoid engine damage caused by excessive ethanol. Lightweight and highly rated, it’s the essential tool for anyone serious about fuel quality and vehicle longevity.

Specifications

ASIN	B073HLSVHX
Best Sellers Rank	#82,145 in Automotive ( See Top 100 in Automotive ) #327 in Oil & Fluid Additives
Brand	REV X
Customer Reviews	4.7 4.7 out of 5 stars (2,307)
Date First Available	1 January 2011
Item Weight	18 g
Item model number	ST0501
Manufacturer	REV X
Manufacturer Part Number	ST0501
OEM Part Number	ST0501
Product Dimensions	3.81 x 3.81 x 15.24 cm; 18 g

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

Description

Specifications

Common Questions