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InterDynamics Certified Auto Pro Oil and Fuel System UV Dye Leak Detection for Cars & Trucks & More, 1 Oz, 374CS, Universal
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Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Purchase options and add-ons
Brand | InterDynamics |
Material | Plastic |
Item Weight | 1.6 ounces |
Style | Oil and Fuel Systems UV Dye |
UPC | 047876013741 |
About this item
- One application of oil and fuel system UV leak detection dye
- For use in engine oil, transmissions, power steering systems and gas/diesel fuel systems
- Compatible with all weights of petroleum-based lubricant
- Helps locate leaks
- Professional grade
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- Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon impactCarbon emissions from the lifecycle of this product were measured, reduced and offset.As certified byClimatePartner certified
The Climate neutral label by ClimatePartner certifies that the carbon footprint of a product was calculated and all associated emissions were offset. Additionally, ClimatePartner encourages companies to set ambitious reduction targets and reduce their products' carbon footprints. The certificate number can be entered on ClimatePartner’s website for additional information such as the supported carbon offset project(s). ClimatePartner is improving lives by helping companies tackle climate change with practical solutions.Certification NumberYKXCIT - Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon impactCarbon emissions from the lifecycle of this product were measured, reduced and offset.As certified byClimatePartner certified
The Climate neutral label by ClimatePartner certifies that the carbon footprint of a product was calculated and all associated emissions were offset. Additionally, ClimatePartner encourages companies to set ambitious reduction targets and reduce their products' carbon footprints. The certificate number can be entered on ClimatePartner’s website for additional information such as the supported carbon offset project(s). ClimatePartner is improving lives by helping companies tackle climate change with practical solutions.Certification NumberYKXCIT - Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon impactCarbon emissions from the lifecycle of this product were measured, reduced and offset.As certified byClimatePartner certified
The Climate neutral label by ClimatePartner certifies that the carbon footprint of a product was calculated and all associated emissions were offset. Additionally, ClimatePartner encourages companies to set ambitious reduction targets and reduce their products' carbon footprints. The certificate number can be entered on ClimatePartner’s website for additional information such as the supported carbon offset project(s). ClimatePartner is improving lives by helping companies tackle climate change with practical solutions.Certification NumberYKXCIT - Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon impactCarbon emissions from the lifecycle of this product were measured, reduced and offset.As certified byClimatePartner certified
The Climate neutral label by ClimatePartner certifies that the carbon footprint of a product was calculated and all associated emissions were offset. Additionally, ClimatePartner encourages companies to set ambitious reduction targets and reduce their products' carbon footprints. The certificate number can be entered on ClimatePartner’s website for additional information such as the supported carbon offset project(s). ClimatePartner is improving lives by helping companies tackle climate change with practical solutions.Certification NumberYKXCIT - Sustainability features for this product
Product Certification (1)
Products with trusted sustainability certification(s). Learn moreProduct Certification (1)ISCC PLUS certified products are created using raw materials like recycled plastics and bio-based materials, which can reduce fossil fuel consumption. - Sustainability features for this product
Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon impactCarbon emissions from the lifecycle of this product were measured, reduced and offset.As certified byClimatePartner certified
The Climate neutral label by ClimatePartner certifies that the carbon footprint of a product was calculated and all associated emissions were offset. Additionally, ClimatePartner encourages companies to set ambitious reduction targets and reduce their products' carbon footprints. The certificate number can be entered on ClimatePartner’s website for additional information such as the supported carbon offset project(s). ClimatePartner is improving lives by helping companies tackle climate change with practical solutions.Certification NumberYKXCIT
Product details
- Item model number : 374CS
- Date First Available : July 7, 2004
- Manufacturer : QUEST
- ASIN : B002M4G24U
- Country of Origin : USA
- Best Sellers Rank: #1,681 in Automotive (See Top 100 in Automotive)
- Customer Reviews:
Product Description
Certified A/C Pro Oil And Fuel Systems UV Dye is for use in engine oil, transmissions, power steering systems, and gas or diesel fuel systems to help determine where there might be a leak. Includes one application of oil and fuel system UV leak detection dye. Certified A/C Pro Oil and Fuel Systems UV Dye is a professional grade leak detection dye that is compatible with all weights of petroleum based lubricant.
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Customer Review: Clean engine and mix with fresh oil before using
Mango
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the electronic sensor useful for leak detection. They say it works well and pinpoints leak sources accurately. Many customers consider it a good value for money, saving time and money on repairs. The sensor is easy to use and saves them time and money. However, some customers have mixed opinions about the dye visibility and glow.
AI-generated from the text of customer reviews
Customers appreciate the leak detection feature of the product. They find it useful for finding leaks and pinpointing them accurately, saving time and money on repairs. The infrared light and dyes can be used to locate leaks quickly and efficiently. Overall, customers find the product useful and recommend it as a good value.
"Perfect for engine’s oil leak, work very well with my car" Read more
"Worked perfectly to help find a leak in one of the injectors on my Kubota tractor...." Read more
"...It pinpoints leaks with precision, saving me time and money on repairs. A must-have for any car owner or mechanic!" Read more
"...Waiting to see if I can spot the origin of the slow oil leak...." Read more
Customers appreciate the product's functionality. They say it works well, helps find fluid leaks quickly, and the bright dye is easy to see under any blacklight.
"Perfect for engine’s oil leak, work very well with my car" Read more
"Good stuff easy to see" Read more
"I have been using this product for many years. It works great as long as you do a little pre-inspection preparation...." Read more
"Just put it in my vehicle. I do not know yet. it appears to be a good product. I will review it again later." Read more
Customers appreciate the sensor's value for money. They say it saves them time and money, especially on mechanics.
"...For under ten dollars it was well worth the money." Read more
"...Extremely bright and a huge difference in color. Great for the price." Read more
"...it was like water, did not show where the leak was, was a complete waste of my money...." Read more
"...Luckily it was just the front seal and thanks to this it saved me $$$...." Read more
Customers find the product easy to use and convenient. They mention it's simple to install and effective at finding and fixing oil leaks.
"...Easy to use...." Read more
"...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..." Read more
"Easy to use,precise and good price!" Read more
"This is a very easy product to use. In my case I had the engine steam cleaned and then added the dye...." Read more
Customers appreciate the product's time-saving features. They mention it pinpoints oil leaks and makes finding and fixing them easier. The product also saves diagnostic time and potentially saves money from repairs.
"...It pinpoints leaks with precision, saving me time and money on repairs. A must-have for any car owner or mechanic!" Read more
"...Using this product saves diagnostic time and potentially saves you money from unnecessary repairs because it offers you the ability to pinpoint the..." Read more
"...Helped me locate my oil leak and as a result saved me a lot of time and money on repairs by pinpointing exactly where my leak was coming from." Read more
"...THE LED LIGHT I PURCHASED I WAS ABLE TO PIN POINT MY LEAK AND DO MY OWN REPAIRS AND THIS SAVED ME A LOT OF MONEY ON MY DIESEL TRUCK... THANK YOU ,,," Read more
Customers have different views on the dye's visibility. Some say it shows clearly under UV light, while others mention it looks greenish yellow or purplish to the naked eye.
"...all lights except the ultraviolet, and dye shows as a nice, bright whitish-yellow. For under ten dollars it was well worth the money." Read more
"Not sure if the die or not but very hard to see, did not light up as advertised" Read more
"Purchased to find oil leaks location shows up very well under UV light recommend this item" Read more
"...I gave it 4 stars because it was a little challenging to see if with a bright Uv light...." Read more
Customers have mixed opinions about the glow of the product. Some say it glows brightly under UV light, making the oil glow green. Others say there was no visible glow at all, even in pitch-black conditions.
"...and by the time I laid on the ground under the car there was so much glowing oil I had to have my son stop the car so I could spray all of the..." Read more
"...A few drops of this magic solution, a UV light, and voila! It pinpoints leaks with precision, saving me time and money on repairs...." Read more
"Not sure if the die or not but very hard to see, did not light up as advertised" Read more
"...NO VISIBLE GLOW whatsoever. I did test a small droplet of the dye before pouring it into the engine too...." Read more
Reviews with images

Found an impossible leak
Top reviews from the United States
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- Reviewed in the United States on February 4, 2025Size: UniversalVerified PurchasePerfect for engine’s oil leak, work very well with my car
- Reviewed in the United States on March 10, 2025Size: UniversalVerified PurchaseGood stuff easy to see
- Reviewed in the United States on March 2, 2025Size: UniversalVerified PurchaseWorked perfectly to help find a leak in one of the injectors on my Kubota tractor. I had been smelling raw diesel fuel and seeing some wet spots on the garage floor. Easy to use. Added dye, ran tractor for 10 minutes, used my ultraviolet flashlight and yellow tint shooting glasses to easily find the leak around the #3 injector. Make sure you turn off all lights except the ultraviolet, and dye shows as a nice, bright whitish-yellow. For under ten dollars it was well worth the money.
- Reviewed in the United States on May 31, 2024Size: UniversalVerified PurchaseSay goodbye to mysterious leaks with this UV dye! As a car enthusiast, I've tried many leak detection methods, but none compare to this. A few drops of this magic solution, a UV light, and voila! It pinpoints leaks with precision, saving me time and money on repairs. A must-have for any car owner or mechanic!
- Reviewed in the United States on February 6, 2025Size: UniversalVerified PurchasePurchased to find oil leaks location shows up very well under UV light recommend this item
- Reviewed in the United States on January 3, 2023Size: UniversalVerified PurchaseI struggled for a long time trying to see where the oil leak was coming from. I was stubborn and didn't bother ordering this for over a year. I finally had enough and bought it and started the car and by the time I laid on the ground under the car there was so much glowing oil I had to have my son stop the car so I could spray all of the glowing oil away so I could have him start the car so I could see where it was coming from. I thought it was the oil pan but it was actually my timing cover and in a different spot than where I thought it was coming from. I will buy this any time I need to find a leak. I do recommend buying a big led UV flashlight so it has enough power to really make the dye react. I had no issues at all. I have a random coolant leaking smell in another car and will be buying the correct dye for the coolant for it as well. Never again guess where leaks are coming from.
- Reviewed in the United States on November 29, 2024Size: UniversalVerified PurchaseI 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.
- Reviewed in the United States on April 28, 2024Size: UniversalVerified PurchaseI have been using this product for many years. It works great as long as you do a little pre-inspection preparation. Clean the item well prior to adding the dye, run the item and use a UV light to find the leak. Works well in Engines, Transmissions, Transfer cases, Differentials, Power Steering systems. They say it works in the Fuel systems, but I personally have not tried it in the Fuel. Also works in Diesel engines, but it takes more one bottle of dye. Photos are of Rear main Confirmation, Viewed after the removal of the transmission. The leak was located prior to pulling the transmission by oil running down the back side of the oil pan from inside the bell housing. If the dye does not show up for you, try a different UV Light. Different brands of UV Lights, have slightly different light spectrum's. I have a FLUKE Brand, Police Security Brand, and a generic off brand from Amazon.
5.0 out of 5 starsI have been using this product for many years. It works great as long as you do a little pre-inspection preparation. Clean the item well prior to adding the dye, run the item and use a UV light to find the leak. Works well in Engines, Transmissions, Transfer cases, Differentials, Power Steering systems. They say it works in the Fuel systems, but I personally have not tried it in the Fuel. Also works in Diesel engines, but it takes more one bottle of dye. Photos are of Rear main Confirmation, Viewed after the removal of the transmission. The leak was located prior to pulling the transmission by oil running down the back side of the oil pan from inside the bell housing. If the dye does not show up for you, try a different UV Light. Different brands of UV Lights, have slightly different light spectrum's. I have a FLUKE Brand, Police Security Brand, and a generic off brand from Amazon.Works great. A little patience and a UV Light does the trick.
Reviewed in the United States on April 28, 2024
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Top reviews from other countries
- RyanReviewed in Canada on December 9, 2024
5.0 out of 5 stars Definately recommend
Size: UniversalVerified PurchaseThe only way to find all the leaks
- attiqReviewed in the United Arab Emirates on August 24, 2024
1.0 out of 5 stars Useless
Size: UniversalVerified PurchaseDoes not identify leak
- Howard TReviewed in Australia on April 28, 2024
5.0 out of 5 stars Works well. Finds oil leaks easily.
Size: UniversalVerified PurchaseUsed it for thr first time yesterday and discovered the source of my oil leak quickly . You will need a black light but they are cheap. Recommended .
-
Michel. PepeReviewed in Canada on February 25, 2025
4.0 out of 5 stars Qualité
Size: UniversalVerified PurchaseBien
- MikeReviewed in Australia on March 20, 2024
5.0 out of 5 stars Works as advertised
Size: UniversalVerified PurchaseUsed this to track down an annoying oil leak. Worked almost instantly. Very impressed. Wish it was available locally in a larger size.