What color is this after mixed with motor oil?

It’s a fluorescent blue when viewed under a UV light

How good is this dye? Does it really work?

Yes. makes oil turn an iridescent blue color.

How long do you run the engine to mix this stuff?

Not sure what system you are running the dye through but generally I would recommend running for several minutes until your vehicle comes up to temp. That would be especially true if you are checking for a coolant leak so the thermostat has time to open. Good luck to you.

Can you use this on power steering fluid?

No, use one specifically listed for use in power steering fluid systems.

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TSI Supercool TD8 Total Dye, 8 oz (Self Measure Bottle)

Product ID: 342156372

Details

Colour
Orange Tint
Brand
TSI Supercool
Item Weight
0.6 Pounds
Item Form
Liquid
Compatible Material
Plastic

🔦UV-reactive fluorescent dye

🧪8 oz precision self-measure bottle

🇺🇸Made in USA quality assurance

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£61.29

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In stock

Sold byAmazon UKDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔦 Illuminate leaks before they illuminate your wallet!

TOP RATED BY PROS - 4.6-star rating from 578 users proves it’s the go-to choice for automotive experts.
PRECISION DOSING ZERO WASTE - Self-measure bottle ensures exact 1/4 oz per quart mix for flawless fluid diagnostics.
UV DETECTABLE FLUORESCENT DYE - Instantly spot leaks under UV light—stay ahead of costly repairs and downtime.
VERSATILE FLUID COMPATIBILITY - Works seamlessly with motor oil, brake fluid, diesel, gasoline, and more—one dye to rule them all.
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly manufactured in the USA, guaranteeing premium quality and reliability.

TSI Supercool TD8 Total Dye is an 8-ounce synthetic UV fluorescent dye designed for precise leak detection in a wide range of automotive fluids. Packaged in a self-measure bottle for exact dosing, it’s made in the USA and highly rated by professionals for its reliability and versatility across motor oil, brake fluid, diesel, gasoline, and transmission fluids.

Specifications

ASIN	B008PKWH6C
Best Sellers Rank	#31,803 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #158 in Engine Oils for Cars
Brand	TSI Supercool
Brand Name	TSI Supercool
Colour	Orange Tint
Compatible Material	Plastic
Customer Reviews	4.6 out of 5 stars 578 Reviews
Global Trade Identification Number	00672264001750
Included Components	Unit^Instruction Guide
Item Form	Liquid
Item Type	Automotive Accessories
Item Weight	0.6 Pounds
Manufacturer	TSI Supercool
Manufacturer Part Number	TD8
Model number	TD8
Net Quantity	1.0 Count
Number Of Items	1
UPC	672264001750
Unit Count	1.0 Count

Reviews

A**E

Fluorescent Dye additive

7.08.2025

M**I

Good product

7.10.2024

C**O

Buen detector de fugas

Practico de utilizar y efectivo para esas fugas difíciles de encontrar

18.01.2026

R**.

Easy to use

3.03.2026

D**C

Worked great! Recommend

18.11.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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