If you have ever noticed a stain right after topping off your oil, that coincidence can help you catch a bigger repair later.
You want a dye that is easy to use, compatible with your vehicle, and bright under UV light.
In 2026, a few options stand out for clear leak tracing, but one choice may fit your engine better than the rest, depending on how often you inspect and what you drive.
| ACDelco GM Fluorescent Leak Detection Dye (1 oz) |  | OEM Multi-Purpose | Form: Liquid | Volume: 1 oz | Color: Black | VIEW LATEST PRICE | Read Our Analysis |
| ACDelco GM Engine Cooling System Tracer Dye |  | Coolant Leak Finder | Form: Liquid | Volume: 1 oz | Color: Fluorescent | VIEW LATEST PRICE | Read Our Analysis |
| ACDelco GM Original Equipment Fluorescent Leak Detection Dye |  | Versatile OE Formula | Form: Liquid | Volume: 1 oz | Color: Fluorescent | VIEW LATEST PRICE | Read Our Analysis |
| TSI Supercool TD8 Total Dye 8 oz (Self Measure Bottle) |  | High-Capacity Dye | Form: Liquid | Volume: 8 oz | Color: Orange tint | VIEW LATEST PRICE | Read Our Analysis |
| TSI Supercool UV Leak Detection Dye 1 oz Orange Tint – 16525 |  | Compact Universal Dye | Form: Liquid | Volume: 1 oz | Color: Orange tint | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
ACDelco GM Fluorescent Leak Detection Dye (1 oz)
Should you want a reliable, OE backed leak detection dye for GM vehicles, the ACDelco GM Original Equipment 10-5045 is a strong pick for 2026. You get a 1 oz liquid universal oil dye from ACDelco, identified with part number 19421435 and model 10-5045. GM engineers design, test, and validate these original equipment parts for Chevrolet, Buick, GMC, and Cadillac applications, so you can trust the fit and performance. It is built for multi purpose leak detection, and you can use Amazon’s 30 day return window if needed.
- Form:Liquid
- Volume:1 oz
- Color:Black
- UV detectable:Yes
- Multi-purpose:Yes
- Return policy:30-day return
- Additional Feature:GM Original Equipment
- Additional Feature:Black liquid dye
- Additional Feature:Trim dye application
ACDelco GM Engine Cooling System Tracer Dye
ACDelco GM Original Equipment 10-5057 (12378563) Engine Cooling System Tracer Dye is a smart choice if you need a fast, fluorescent way to track down coolant leaks without wasting time on guesswork. You can add this 1 oz dye to traditional coolant systems, including DEX-COOL, then use UV light to spot leaks quickly. It also helps you isolate power steering leaks when needed. Since it may alter coolant color, you should verify the fluid afterward. Although it is discontinued, it still offers OEM backed convenience, cleaner diagnostics, and less labor when searching for leaks in tight engine bays.
- Form:Liquid
- Volume:1 oz
- Color:Fluorescent
- UV detectable:Yes
- Multi-purpose:No
- Return policy:30-day return
- Additional Feature:For traditional coolant
- Additional Feature:DEX-COOL compatible
- Additional Feature:Power steering use
ACDelco GM Original Equipment Fluorescent Leak Detection Dye
With its 1 oz multipurpose formula, the ACDelco GM Original Equipment Fluorescent Leak Detection Dye is a strong choice if you want one dye that works across gasoline and diesel engine oil, as well as power steering fluid and automatic transmission fluid. You can add it to the system, then use an ACDelco UV Leak Detection Lamp Kit to spot leaks quickly and accurately. It is designed to stay in the fluid after detection, so you do not lose its tracing ability right away. That makes it practical for both professional shops and DIY maintenance whenever you need clear, visible leak tracking.
- Form:Liquid
- Volume:1 oz
- Color:Fluorescent
- UV detectable:Yes
- Multi-purpose:Yes
- Return policy:Not specified
- Additional Feature:Gasoline and diesel
- Additional Feature:Safe for transmission
- Additional Feature:Works with UV kit
TSI Supercool TD8 Total Dye 8 oz (Self Measure Bottle)
TSI Supercool TD8 Total Dye is a strong choice if you want one dye that works with more than just engine oil. It is compatible with motor oil, hydraulic fluid, power steering fluid, brake fluid, diesel fuel, gasoline, and transmission fluids. Add 1/4 ounce per quart, so dosing stays simple with the self-measure bottle. Its orange tint shows clearly under UV light, and it is most effective in clean diesel and engine oils. With an 8 ounce bottle, you get broad coverage for leak checks. It is made in the USA and includes an instruction guide.
- Form:Liquid
- Volume:8 oz
- Color:Orange tint
- UV detectable:Yes
- Multi-purpose:Yes
- Return policy:30-day return
- Additional Feature:1-year warranty
- Additional Feature:Self-measure bottle
- Additional Feature:Includes instruction guide
TSI Supercool UV Leak Detection Dye 1 oz Orange Tint – 16525
For drivers and DIYers who need a compact, easy-to-dose leak tracer, TSI Supercool UV Leak Detection Dye is a strong choice. You get a 1 oz orange-tint liquid that works with motor oil, hydraulic fluid, power steering fluid, brake fluid, diesel, gasoline, and transmission fluid. Add 1/4 ounce per quart for a simple mix, then inspect under UV light. It is most effective in clean diesel and engine oil, and the small bottle stores easily. Made in the USA, it includes an instruction guide and carries a 1-year manufacturer warranty, giving you practical leak-finding confidence.
- Form:Liquid
- Volume:1 oz
- Color:Orange tint
- UV detectable:Yes
- Multi-purpose:Yes
- Return policy:30-day return
- Additional Feature:1-year warranty
- Additional Feature:Compatible with plastic
- Additional Feature:Instruction guide included
Factors to Consider When Choosing Engine Oil Dye
When choosing engine oil dye, make sure it is compatible with your fluid and clearly visible under your leak detection lamp. You should also check the mixing ratio so you add the correct amount without affecting performance. Bottle size is another important factor, especially if you work on more than one vehicle or plan to use the dye regularly.
Fluid Compatibility
Fluid compatibility matters because the dye has to work with the fluids already in your system without causing problems. Choose a formulation that is safe for gasoline, diesel, power steering fluid, and automatic transmission fluid if those fluids are present in your vehicle. Check the manufacturer’s recommendations so you know the dye stays inert and will not react with your oil or coolant. If your system uses a specific coolant, such as DEX-COOL, pick a dye made for that type. You also want a product that will not disrupt the fluid’s existing color or chemistry. For best results, use dye in a clean system because dirt, sludge, or old fluid can weaken performance and make leak tracing less reliable.
Dye Visibility
Visibility is what turns engine oil dye from a guess into a useful leak-finding tool, especially under UV light, where fluorescent yellow, green, or orange formulas stand out fast. When you choose a dye, look for strong fluorescence that stands out against dark oil, grime, and painted parts. Some colors show up better than others depending on what is in the system, so pick a shade that will not disappear in the fluid you are tracking. A good dye should keep glowing after the initial inspection, so you can spot fresh leaks later without starting over. In clean diesel and engine oil, high-visibility dyes usually make traces easier to follow. Better visibility means faster diagnosis, less cleanup, and a clearer path to the source.
Mixing Ratio
Once you can clearly see the dye under UV light, the next step is getting the amount right. You will usually mix about 1/4 ounce per quart of fluid, but you should always check the product label first. Different dyes can have different concentrations, so the manufacturer’s guidance matters. If you add too much, dye can build up and affect how the system works, and it can make later leak checks harder. The correct ratio keeps the dye evenly distributed through the oil, which helps you spot leaks quickly. It also lowers the chance of unwanted chemical reactions with other additives. Measure carefully, mix thoroughly, and follow the recommended amount to protect both accuracy and engine health.
Leak Detection Lamp
A good leak detection lamp is the tool that makes fluorescent engine oil dye easy to see because it emits UV light that activates the dye and turns small leaks into clear traces. You will want a lamp that gives off strong ultraviolet output so the dye glows clearly on hoses, seals, and fittings. Handheld models work well when you need mobility, while larger workbench units suit stationary inspections. For the best results, keep the area dimly lit so the fluorescence stands out. You should also check that the lamp is easy to maintain because clean lenses and fresh bulbs help it perform consistently. With the right lamp, you can spot leaks faster, confirm their source, and fix problems before they spread.
Bottle Size
Bottle size matters because it can make engine oil dye more cost-effective and easier to keep on hand. If you only diagnose leaks occasionally, a 1 oz bottle usually fits your needs without wasting money or shelf space. If you service vehicles often or run a shop, an 8 oz bottle can offer better value per ounce and reduce repeat orders. You should also match the size to the system you are treating, since some systems need more dye to show leaks clearly. Check the mixing instructions before you buy, because the recommended amount per quart can change which size works best. Choosing the right bottle helps you stay prepared, avoid extra purchases, and get reliable leak detection every time.
Frequently Asked Questions
Can Engine Oil Dye Damage Seals or Gaskets?
Usually, engine oil dye will not damage seals or gaskets if you use the recommended amount. Overdosing can thicken the oil or irritate aging parts, so follow the label directions and check compatibility.
How Long Does Engine Oil Dye Remain Visible Under UV Light?
Typically, you’ll still see engine oil dye under UV light for weeks or months, but its glow can fade. You’ll know it is working when the trace lingers, even after the leak seems gone.
Is Engine Oil Dye Safe for Hybrid Engines?
Yes, engine oil dye can be used safely in most hybrid engines if you follow the product instructions and use the correct amount. First, verify compatibility with your vehicle’s oil and warranty requirements.
Can I Mix Different Brands of Engine Oil Dye?
You should not mix different brands unless the labels state that they are compatible. Mixing dyes can cause uneven fluorescence, reduce accuracy, or clog systems. Use one dye, flush the system when needed, and follow the manufacturer’s instructions.
Will Engine Oil Dye Affect Oil Change Intervals?
Usually, no. Engine oil dye will not affect your oil change intervals when you use the recommended amount. You should still follow your manufacturer’s schedule, because too much dye can cloud readings and complicate diagnostics.
Final Thoughts
To wrap it up, you can’t go wrong with ACDelco GM Fluorescent Leak Detection Dye if you want a reliable, easy to use option for spotting oil leaks fast. It works like a flashlight in a dark room, turning hidden leaks into clear clues under UV light. If you need more volume or a universal choice, the TSI Supercool options are also solid. Choose the dye that fits your vehicle, and you’ll save time, money, and frustration.
