does it work in waste oil tanks?

It is compatible with new oil. However things to keep in mind are that used oil collection tanks are filled with contaminated oil that could have moisture/water suspended in the oil that would throw off your readings. So it will not work as well in used oil storage.

I understand how to use to test for water... but I am looking for details on the statement "Accurately detects phase separation in ethanol"?

Water can dissolve in a 10% ethanol/ gasoline mixture from about 0.04 to 0.06 percent. Above that limit, the water and ethanol mixture will collect in the bottom of the tank. The water and ethanol mixture can be hard to detect so use cut paste that is designed to detect water in ethanol. I put it on the bottom of the stick, graduated pole, and leave it in the tank for five minutes. Usually, water level will show up as a transition from pink to tan. I usually deal with diesel so I can use the cheap stuff. Look at EPA.gov for further information.

affected by outside humidity? can i use to determine if my lot flooded with a rain protected stick?

The water cut paste is used to determine water level in underground and above ground tanks. It changes to red if exposed to water and we leave it in the tank for 15 minutes or so. We do not leave it exposed to humidity so I really don't know the answer.

If this item gets on clothing does it come out?

Yes.... If Gasoila gets on clothing it certainly comes out, but it's best to deal with it sooner than later. The paste is like clay when it hardens so it will get more difficult to remove as it hardens. In general one shouldn't have too much of a problem and the product works well for its purpose.

Gasoila All Purpose Water Finding Paste Rapid Water Detection Fuel

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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€ 52.37

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Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Detect water before it disrupts your drive!

CLEAR COLOR CHANGE - Bright yellow-green indicator ensures you never miss water presence in your fuel.
UNIVERSAL FUEL USE - Compatible with gasoline, diesel, kerosene, methanol, and petroleum blends for versatile application.
ETHANOL BLEND READY - Detects phase separation in modern E10 and E15 fuels, preventing costly damage.
RAPID WATER DETECTION - Instantly identifies water contamination to protect your fuel system.
EFFORTLESS APPLICATION - Simple dip-and-read formula—no tools, no hassle, just reliable results on the spot.

Gasoila All-Purpose Water Finding Paste is a fast-acting, easy-to-use solution for detecting water contamination across all petroleum fuels, including ethanol blends. Its instant color change and universal compatibility make it an essential tool for maintaining fuel quality and preventing equipment damage.

Reviews

S**C

Works great!

Exactly as described. Works great at detecting water. If the water is mixed with other things, (like coolant) it is slow to react though

23.01.2026

L**Y

Great.

Excellent product.

8.11.2025

G**9

No water in the oil!

Worked great identifying water in an oil tank.

28.06.2025

J**N

Ck for clean fuel

It works Apply a bit to a stick,dip to bottom of fuel tank. No change of color no problem. Change of color indicates water in fuel

5.02.2026

L**L

Effective

Effective water indicator

29.05.2025

M**Y

It works like it should.

It went on the testing pole well, and worked to tell if there was any water in the kerosene.

3.12.2020

S**E

Right product ..right price.

Did exactly what needed it to do. Wanted to insure my emergency storage tank was clear of water.

6.08.2025

A**N

Arrived quickly

Item arrived quickly and was as described

2.10.2025

T**L

Product works good but quantity is sooo less for this price .

26.01.2021

C**N

No lo tuvieron

7.01.2020

R**D

1.08.2019

A**R

Working good

19.09.2018

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€ 52.37

Duties & taxes included

In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Spain.

Secure transaction

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Fast, free shipping, member pricing & priority support.

Join PRO →

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ASIN	B002M8KX1E
Best Sellers Rank	#98,136 in Automotive ( See Top 100 in Automotive ) #96 in Fuel Additives
Date First Available	December 4, 2010
Is Discontinued By Manufacturer	No
Item Weight	2.4 ounces
Item model number	AP02
Manufacturer	Federal Process
Product Dimensions	8 x 7 x 8 inches

Gasoila All-Purpose Water Finding Paste, Rapid Water Detection for Fuel Storage, Detects Water in Gasoline, Diesel, Kerosene, Ethanol, Methanol, Petroleum Fuels, Phase Separation, 2 oz. Tube

Description

Specifications

Reviews

Common Questions