Best Oil Leak Dye Kit for Automotive Fluid Leaks

#1 · Best Overall

1. LEAKFINDER LF2008

• Weight: 1 oz
• Form: Liquid
• Warranty Description: No warranty

Best for: Micro-leak fluid diagnosis.

Why it ranks #1: Its universal fluorescent formula is specified for oil, fuel, ATF, and power steering systems, with yellow-green visibility for small or intermittent leaks.

Fluorescent yellow-green dye that circulates and glows under UV light is the central feature of LEAKFINDER LF2008, enabling visibility of small, hidden, or intermittent leaks. Its stated coverage includes oil, fuel, ATF, and power steering systems, making it a multi-fluid diagnostic bottle.

Because LF2008 is listed for oil, fuel, ATF, and power steering systems, it can serve when the suspected leak is not yet narrowed to one of those fluids. The yellow-green fluorescence under UV light is intended to reveal even micro and intermittent leak paths, helping focus a visual inspection. LEAKFINDER says the dye can remain in the system after detection, so a repair can be rechecked later without removing the dye. Add it to the suspect system and circulate it.

Skip it if you need an injector and UV flashlight together; LEAKFINDER LF021 includes an injector and flashlight.

This fits a buyer tracing small or intermittent leaks across its listed oil-based fluids who already has UV inspection equipment. Its leave-in dye supports later rechecks, but the product listing does not include a light.

Listed on Amazon as: LF2008 Automotive Oil-Based Fluid Leak Detection Dye

#2 · Broad Fluid Coverage

2. A/C Pro Oil and Fuel Dye

• Weight: 1.6 oz

Best for: Multi-fluid vehicle diagnostics.

Why it ranks #2: The one-application dye covers engine oil, transmissions, power steering, and gas or diesel fuel, and works with petroleum-based lubricant weights.

One application of UV dye covers several oil-based vehicle systems, letting you investigate more than an engine-oil leak with a single product. A/C Pro lists engine oil, transmissions, power steering, and gas or diesel fuel systems, and says the dye works with all weights of petroleum-based lubricant.

That broad fluid coverage is useful when the leak source is uncertain: the same dye is listed for engine oil, transmission fluid, power steering, and gas or diesel fuel systems. Compatibility with all weights of petroleum-based lubricant also gives it a defined range across oil viscosities. The supplied description specifies one application, making this a focused option for a diagnostic check rather than a multi-application supply. You will need a suitable UV inspection light to view the dye.

Skip it if you need an included UV light and glasses; the Lichamp LA01 kit supplies both for inspection.

Choose this for a vehicle owner diagnosing a possible leak across several listed oil-based systems with one application. Its coverage is broad, but the package is dye rather than a listed UV-light kit.

Listed on Amazon as: A/C PRO Certified Oil and Fuel System UV Dye, Leak Detector for Cars, 1 Oz

#3 · GM Equipment Pick

3. ACDelco Multi-Purpose Dye

• Weight: 9.07 g
• Form: Liquid
• Warranty Description: No Warranty

Best for: GM-compatible fluid checks.

Why it ranks #3: This 1-ounce dye is specified for gasoline and diesel engine oil, power steering, and automatic transmission fluid, and remains in the system.

ACDelco’s multi-purpose fluorescent dye is specified for gasoline and diesel engine oil, power steering fluid, and automatic transmission fluid, enabling checks across several common vehicle systems. It is intended for use with the ACDelco Ultra Violet Leak Detection Lamp Kit and can remain in the system after detection.

The four listed fluid categories make this useful when checking engine oil, steering, or automatic transmission systems without switching dye products. Using it with the ACDelco UV Leak Detection Lamp Kit provides the stated inspection pairing, while the leave-in formulation means dye need not be removed after a leak check. ACDelco says its Original Equipment and Gold aftermarket chemicals suit GM and many non-GM vehicles; this is a fluid tracer, not a lamp, so the light is a separate consideration.

Skip it if you need the UV flashlight in the same purchase; Lichamp LA01 includes a flashlight and protective glasses.

This fits buyers checking the listed oil-based fluids who have access to an ACDelco UV lamp. ACDelco identifies GM and many non-GM vehicle applications for its chemical lines, while the lamp is not included here.

Listed on Amazon as: ACDelco 1148963 GM Original Equipment 10-5045 Multi-Purpose Fluorescent Leak Detection Dye – 1 oz

#4 · Complete Diagnostic Kit

4. LEAKFINDER LF021

• Form: Liquid
• Warranty Description: No warranty

Best for: Modern A/C and fluid diagnostics.

Why it ranks #4: The multi-system kit includes an injector, flashlight, and single-use cartridges, covering oil fluid leaks as well as A/C and coolant diagnostics.

A UV dye injector with pre-measured, single-use cartridges is the defining feature of LEAKFINDER LF021, enabling controlled diagnostic shots without measuring each dose. The kit includes a flashlight and supports R-134a and R-1234yf A/C systems, alongside coolant and oil-fluid leak detection.

The injector’s pre-measured cartridges streamline each check, while the included flashlight lets users inspect for fluorescent dye without sourcing that tool separately. Compatibility with R-134a and R-1234yf A/C systems makes the kit relevant to those specified refrigerants, and its multi-system description also names coolant and oil-fluid leaks. The fluorescent dye is intended to reveal small, hidden, or intermittent leaks and can remain in the system for later repair rechecks. Single-use cartridges suit discrete diagnostics, not bulk dosing.

Skip it if you want an eight-ounce self-measure dye bottle for multiple fluid systems; TSI Supercool TD8 provides that format and range.

This fits technicians or vehicle owners diagnosing A/C, coolant, and oil-fluid leaks who value measured cartridges and an included light. Its specified A/C compatibility covers R-134a and R-1234yf systems.

Listed on Amazon as: LF021 Multi-System Leak Detection Kit for A/C, Coolant and Oil Fluid Leaks – UV Dye Injector w/Flashlight, Single-Use Cartridges, R-134a & R-1234yf Compatible

#5 · Dirty Oil Formula

5. Yesibeike Oil-Based UV Dye

• Weight: 1 oz

Best for: Dark used-engine-oil tracing.

Why it ranks #5: Its oil-based formula is specifically intended to reveal leaks in dark, used engine oil and also lists ATF, power steering, hydraulic fluid, and compatible fuel systems.

Oil-based UV dye specifically described for dirty, dark engine oil is the key distinction here, enabling inspection where used oil can make a leak path difficult to see. Yesibeike also lists fuel, ATF, power steering, and hydraulic fluid checks, extending its use beyond the engine.

The dirty-oil focus makes this a considered option for tracing seepage on an engine with dark, used oil; the supplied facts also identify small, slow, and intermittent leak paths as targets. Its listed range includes engine oil, fuel, ATF, power steering, and hydraulic fluid, so one dye can address several compatible fluid systems. For most passenger vehicles, the supplied guidance gives 1–2 tablespoons for engine oil and says to shake well and run the engine briefly.

Skip it if you want an included UV light and glasses; Lichamp LA01 lists both in its automotive detector kit.

Choose this when dark used engine oil makes a seep hard to trace, or when checking its other listed fluid systems. It requires a compatible UV light, and the stated dose is guidance for passenger vehicles.

Listed on Amazon as: 5.07 fl oz Oil-Based UV Leak Dye for Dirty Engine Oil

#6

6. TSI Supercool TD8

• Weight: 9.6 oz
• Form: Liquid
• Warranty Description: 1 year manufacturer

Best for: Bulk multi-fluid dye dosing.

Why it ranks #6: The 8-ounce self-measure bottle is specified for motor oil, hydraulic and power steering fluid, brake fluid, fuel, and transmission fluids.

An eight-ounce self-measure bottle is the defining practical feature of TSI Supercool TD8, enabling repeated dosing without relying on a single-use application. The dye is listed for motor oil, hydraulic and power steering fluids, brake fluid, diesel, gasoline, and transmission fluids.

The self-measure bottle pairs a larger eight-ounce supply with a specified mixing rate of one-quarter ounce per quart, helping users portion dye for different fluid volumes. Its stated range spans motor oil, hydraulic and power steering fluid, brake fluid, diesel, gasoline, and transmission fluids, which can simplify keeping one dye for multiple system checks. The description says it is most effective in clean diesel and engine oil; that qualification matters when choosing where to use it.

Skip it if you mainly need a dye specifically described for dirty used engine oil; Yesibeike's 5.07 fl oz dye names that condition.

This suits users handling repeated diagnostics across several listed fluid types and who can measure the stated dose. Its performance note favors clean diesel and engine oil, so account for that when selecting a system.

Listed on Amazon as: TSI Supercool TD8 Total Dye, 8 oz (Self Measure Bottle)

#7

7. WANJAO Engine Oil Dye

• Weight: 4.1 oz

Best for: Long-term engine-oil monitoring.

Why it ranks #7: This 100 mL engine oil dye is described as fluorescing yellow-green against dark parts and remaining in the system for monitoring.

WANJAO’s yellow-green fluorescence is intended to contrast with engine grease and dark components, enabling visual tracing of an oil leak under light. Its description also says the dye can remain in the system indefinitely for long-term monitoring, making ongoing observation its distinguishing use.

The stated contrast against grease and dark parts helps identify where engine oil is escaping, while the claimed long-term stability means the dye can remain in the system for monitoring. The product description says it resists crystallizing or separating under extreme storage conditions, a practical point for keeping the bottle between diagnostic jobs. The supplied facts focus on engine oil and do not specify a dose, other fluid compatibility, or an included inspection light, so plan around the listed engine-oil use.

Skip it if you need a stated multi-fluid range and dosing guidance; Yesibeike's 5.07 fl oz dye lists both.

Choose this for engine-oil leak tracing when retaining dye for longer-term monitoring matters. Its fluorescence and storage stability are specified, but buyers needing a defined dose or broader fluid compatibility should consider another listing.

Listed on Amazon as: 100ML Engine Oil Dye Leak Detection Kit, Accurately Locate Leaks

#8

8. TRACER Gas Engine Oil Dye

• Weight: 3.2 oz
• Form: Liquid
• Warranty Description: 1 yr warranty on material and workmanship

Best for: Repeat gasoline-engine checks.

Why it ranks #8: The listing specifies gasoline engine oil dye in 1-ounce bottles, but does not detail broader fluid compatibility or an included UV light.

Six one-ounce bottles are the clearest differentiator of this TRACER product, enabling multiple separate gasoline engine-oil dye applications from one pack. The supplied listing identifies it specifically as gas engine oil dye, so its defined use is narrower than a multi-fluid diagnostic dye.

The six-bottle quantity is practical for repeated gasoline engine-oil checks or keeping separate one-ounce portions available for later jobs. Because the listing identifies the dye for gasoline engine oil, buyers can match it to that specific fluid rather than assuming coverage of transmission, power steering, or fuel systems. The supplied description calls it easy to use but does not state a dose, UV-light inclusion, or other fluid compatibility, so plan the inspection around those limits.

Skip it if you need stated transmission and power-steering compatibility; A/C Pro 374CS lists both alongside engine oil.

Choose this for repeated gasoline engine-oil leak checks where multiple one-ounce bottles are useful. The supplied listing does not establish compatibility with other fluids or include a UV light, so keep the application narrow.

Listed on Amazon as: Tracer Products TP-3090-0601 Gas Engine Oil dye, 1 Pack

#9

9. Lichamp AC Leak Detector Kit

• Weight: 10.6 oz

Best for: UV-light kit for spot checks.

Why it ranks #9: Its 385–395 nm UV flashlight and glasses are useful inspection tools, but the listing focuses on A/C refrigerant leaks rather than oil-system dye.

A 385–395 nm UV flashlight with 100 LEDs is the defining feature of this Lichamp kit, enabling inspection of suspected automotive A/C leak locations in a garage or outdoors. Protective glasses are included, and the light also has listed uses beyond vehicle diagnostics.

The high-intensity 385–395 nm flashlight gives you a dedicated light for checking suspected A/C leak positions, while the included protective glasses make the kit ready for UV inspection. Its stated automotive use is detecting refrigerant leakage in air conditioning systems; the product also lists finding pet stains and food stains on fabrics. That makes the tool useful beyond the garage, although the supplied details do not specify an oil-system dye dose or fluid compatibility.

Skip it if you need a listed engine-oil dye and fluid coverage; A/C Pro 374CS specifies oil-system applications.

This suits buyers seeking a UV inspection tool for automotive A/C leak checks, with household stain detection as an extra use. Choose a separately specified oil-compatible dye when diagnosing engine or transmission fluid.

Listed on Amazon as: Lichamp AC Leak Detector Kit Automotive, UV Oil Dye Leak Detection Kit Includes AC UV Light and Protective Glasses, LA01

#10

10. ABOTHGD UV Diagnostic Kit

• Weight: 1.6 oz

Best for: Protected UV flashlight inspection.

Why it ranks #10: The 68-LED flashlight and protective goggles support inspection, but the product is framed as an A/C and oil diagnostic kit without clear oil-fluid compatibility details.

A 68-LED UV flashlight paired with protective goggles is this ABOTHGD kit’s defining combination, enabling illuminated leak inspection while providing eye protection during use. The listing describes the light as detecting refrigerant and oil leaks and presents the kit for automotive and broader UV inspection tasks.

The 68 high-intensity LEDs are described as brighter than standard lights, supporting the kit’s stated aim of pinpointing refrigerant and oil leaks. Included UV-protection goggles address eye shielding during inspection, so the basic light-and-protection combination is in the package. The listing also describes a multi-purpose flashlight for stains and hidden details. Supplied details do not identify a dye amount, dosing instructions, or specific oil-fluid compatibility, so this is best understood as a UV tool kit rather than a fully specified oil-dye supply.

Skip it if you need a defined engine-oil dye and fluid range; A/C Pro 374CS specifies both oil applications and lubricant compatibility.

This suits buyers seeking a UV flashlight and eye protection for automotive inspection and other listed UV uses. For oil-leak work, check that the dye and fluid compatibility needed for the job are specified separately.

Listed on Amazon as: Car Oil and Air Conditioner Testing Pro Diagnostic Kit AC UV Oil Dye Leak Detection Kit with 68 LED UV Flashlight and Protective Glasses Auto AC Leak Detector Tool