



🔍 Find leaks before they find you – the pro’s secret weapon!
A/C Pro Certified Auto Pro Oil and Fuel System UV Dye is a professional-grade leak detection solution designed for cars, trucks, and more. This 1 oz universal formula works with all petroleum-based lubricants across engine oil, transmissions, power steering, and fuel systems. When used with a UV flashlight, it quickly highlights leaks, saving time and costly repairs.






| ASIN | B002M4G24U |
| Best Sellers Rank | #1,522 in Automotive ( See Top 100 in Automotive ) #4 in Engine & Oil Fluid Additives |
| Brand | A/C Pro |
| Brand Name | A/C Pro |
| Customer Reviews | 4.5 out of 5 stars 2,395 Reviews |
| Global Trade Identification Number | 00047876013741 |
| Included Components | QUEST Auto A/C Recharge |
| Item Type Name | Auto A/C Recharge |
| Item Weight | 0.1 Pounds |
| Manufacturer | QUEST |
| Material | Plastic |
| Material Type | Plastic |
| Measuring Range | Broad (Universal) |
| Model | 374CS |
| Output Type | Digital |
| Style | Oil and Fuel Systems UV Dye |
| Style Name | Oil and Fuel Systems UV Dye |
| UPC | 047876013741 |
| Unit Count | 1.0 Ounce |
| Upper Temperature Rating | 250 Degrees Fahrenheit |
P**G
Easy and definitely works
Worked perfectly. Using UV flashlight saw my leak after running engine for less than 5 minutes. Highly recommend.
S**T
Work’s well
With this oil I was able to trace the mystery leak in my transmission. Worked as advertised. Worth the money. I used an UV flashlight I purchased separately.
I**Z
Great product for diagnosis
I used this dye to help diagnose a fuel leak in a carburetor. It worked outstandingly well. With just a drop of it in a few ounces of fuel, it lit up bright when exposed to a little UV light. I would not have otherwise been able to find the leak since it was a small weeping leak that did not appear “wet” but the dye showed exactly where it was.
J**J
More orange than yellow in engine oil
Looks more orange than yellow in engine oil under a black light with yellow glasses on. Ends up almost the same color as Dexcool coolant. Would be more helpful if it was actually yellow looking. Otherwise works like dye should.
D**R
UV light and glasses needed
Easy to see with UV light and glasses, good price , will definitely help find oil leaks.
M**A
Use the Florecent Dye to Find the Leak
This A/C Pro florescent dye will help you find the leak! It worked for us when tracking down the power steering leak in the Nissan Quest. Because it saves you a ton of time, it's a great value.
W**R
Works great
Worked great!
T**Y
Not good in detecting leaks
I used this UV in my two vehicles, none of them showed any significant signs of leak via UV light. I used a very strong UV light designed for oil leak detections. However, nothing is showed clearly with this dye. Installation is easy though with just put this dye directly into engine oil fill spot and driving around, so the dyes can go into leak areas.