InterDynamics Certified Auto Pro Oil and Fuel System UV Dye Leak Detection for Cars & Trucks & More, 1 Oz, 374CS, Universal

I had a mysterious oil leak on my side by side leave a puddle. Hard to tell where it came from, because I changed all the fluids and the oil was clear/clean. The engine was gritty and sticky. All kinds of possible areas where it might be leaking. I had visions of my engine being ruined in my head and hours of investigating to do.I heard about this product. You just put a little bit in your oil and run the engine. Then, shine a UV light(not included, but they sell UV flashlights) and the area leaking glows bright neon yellow. This works great! My issue ended up being weaping line off the water pump. I never would have checked there! I also got the peace-of-mind confirmation that all the other gaskets and seals were tight.It works great, especially in dark engine bays…because the dye glows like black light paint. It’s not subtle. It glows under the UV light. Cleans up with brake cleaner and a rag for future testing.I don’t know what I did without this. I’m telling everybody about this now.

Crazy that I didn't know about this stuff a long time ago. Within. 2 seconds I saw the glow in the oil leak after I started my car. I didn't even know there was a cooler sandwiched between the filter and the block until I saw that glow in the black light

Couldn't find the leak, but I assure you that this product does in fact glow in UV light.Poured it in the gas tank on a quarter level - didn't harm anything at all.Part of my driveway glows in the dark after a fuel spill.

Just put it in my vehicle. I do not know yet. it appears to be a good product. I will review it again later.

Worked 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.

This stuff is freaking cool!turns out It was simple leak, but man how cool!

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.

great stuff! helped me find the leaks that I coundend find (although you need a UV light)