Keeping your engine at optimal temperature is critical for performance and longevity. We researched and compared the top engine coolers on the market, evaluating manufacturer specifications, industry standards, and aggregated owner feedback. Our buying guide covers oil coolers, transmission coolers, and auxiliary radiators to help you choose the right one for your vehicle.
| Photo | Product | Score | Buy |
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Mishimoto MMBOC-00 Engine Oil Cooler Kit Best Overall All-aluminum bar-and-plate core, 10-row, includes -10 AN fittings and braided hose |
9 | 🛒 Check Price |
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Derale 13750 Transmission Cooler Best Transmission Cooler Plate and fin design, 16,000 GVW rating, includes thermostatic fan |
8.7 | 🛒 Check Price |
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Hayden Automotive 678 Engine Oil Cooler Best Budget Tube-and-fin design, 7/8 inch wide, 10 psi pressure cap included |
8.2 | 🛒 Check Price |
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Setrab 50-610-7612 ProLine Oil Cooler Best High-Performance 19-row, 6-inch core, brazed aluminum, 1/2 inch NPT ports |
8.4 | 🛒 Check Price |
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B&M 70268 SuperCooler Transmission Cooler Best Compact 11-1/2 x 6 x 1-1/2 inch, 12,500 GVW, includes mounting straps |
8 | 🛒 Check Price |
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CXRacing 2 Row Aluminum Radiator Best Auxiliary Radiator 2-row core, 1 inch tubes, aluminum construction, universal fit |
7.8 | 🛒 Check Price |
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Mocal 235-75 Engine Oil Cooler Best Universal 10-row, 1/2 inch BSP ports, aluminum bar-and-plate |
7.3 | 🛒 Check Price |
1. Mishimoto MMBOC-00 Engine Oil Cooler Kit: Best Overall
The Mishimoto MMBOC-00 is a direct-fit oil cooler kit designed for many popular vehicles. In our evaluation, the bar-and-plate core offers superior heat dissipation compared to tube-and-fin designs, and the included -10 AN fittings allow for easy integration with existing oil lines. Owner feedback consistently reports noticeable temperature drops during heavy use.
However, the kit is not universal and requires specific vehicle compatibility. Some users noted that the included hoses are relatively short, limiting mounting options. If you need a universal cooler for a custom application, consider a different product.
- High-quality aluminum construction with TIG welds for durability
- Includes all necessary mounting brackets and hardware
- Proven to reduce oil temperatures by 20-30°F in track use
Pros: Excellent build quality and fitment; Comprehensive kit with everything needed
Cons: Premium price point may not suit all budgets
2. Derale 13750 Transmission Cooler: Best Transmission Cooler
The Derale 13750 is a transmission cooler with an integrated fan, making it ideal for vehicles that see stop-and-go traffic or towing. We compared its specs to others in its class and found the 16,000 GVW rating suitable for most trucks and SUVs. Owner reviews praise its ability to keep transmission temperatures in check during heavy loads.
That said, the fan adds electrical complexity and a potential failure point. Some users reported the fan motor failing after a few years. If you prefer a simpler, passive cooler, this may not be the best choice.
- Self-contained with electric fan for consistent airflow
- Rated for heavy-duty towing and high heat conditions
- Easy installation with included mounting kit
Pros: Fan ensures cooling even at idle or low speed; Great value for the performance
Cons: Fan can be somewhat noisy; Not as compact as some competitors
3. Hayden Automotive 678 Engine Oil Cooler: Best Budget
The Hayden 678 is a budget-friendly engine oil cooler that offers decent cooling for daily drivers and light-duty use. We found that its tube-and-fin construction is less effective at heat transfer than more expensive options, but for most street-driven cars, it provides adequate cooling. Owner feedback highlights the straightforward installation and good value.
However, the cooler’s pressure cap is only rated to 10 psi, which may not be sufficient for high-performance engines. If you track your car or have a modified engine, you should look for a higher-capacity cooler.
- Affordable solution for basic engine cooling needs
- Compact size fits in tight engine bays
- Easy to install with basic tools
Pros: Very cost-effective for the cooling improvement; Lightweight and simple design
Cons: Less efficient than bar-and-plate coolers; Not suitable for extreme racing conditions
4. Setrab 50-610-7612 ProLine Oil Cooler: Best High-Performance
The Setrab ProLine is a professional-grade oil cooler used in motorsports. In our evaluation, its brazed aluminum core offers superior heat rejection compared to typical bar-and-plate coolers. Owner feedback from track enthusiasts confirms significant oil temperature reductions.
However, this cooler comes at a high cost and is sold as a bare core without fittings or brackets. It is intended for custom installations and may not suit beginners or those on a budget. If you need a ready-to-install kit, look elsewhere.
- Swedish-made, motorsport-grade construction
- Extremely efficient brazed aluminum core
- Lightweight yet solid design
Pros: Top-tier cooling performance for racing; Excellent build quality and durability
Cons: Very expensive for the size; Requires custom mounting and hoses
5. B&M 70268 SuperCooler Transmission Cooler: Best Compact
The B&M SuperCooler is a compact transmission cooler designed for vehicles with limited space. We compared its dimensions and found it fits where larger coolers cannot. Owner reviews mention it works well for daily driving and light towing, keeping temperatures stable.
However, its 12,500 GVW rating means it is not recommended for heavy-duty use or high-performance vehicles. Some users reported that it struggles in very hot climates or with aggressive driving. If you need a cooler for a heavy truck or track car, consider a larger unit.
- Ultra-compact size fits in tight spaces
- Effective for moderate towing and street use
- Simple push-on hose connections
Pros: Very easy to install with included hardware; Small footprint for cramped engine bays
Cons: Not suitable for heavy towing or extreme heat; Lower GVW rating limits application
6. CXRacing 2 Row Aluminum Radiator: Best Auxiliary Radiator
The CXRacing aluminum radiator is a universal auxiliary option for those needing extra cooling. We researched owner feedback and found that many use it as a secondary radiator in custom builds or to supplement a stock system. Its two-row core provides good heat rejection for the price.
However, as a universal part, it may not bolt directly into all vehicles and often requires custom brackets or hoses. Some users reported weld quality issues leading to leaks over time. If you prefer a direct-fit radiator, this may not be the best choice.
- Additional cooling capacity for modified engines
- Universal fit with adjustable mounting tabs
- TIG welded for strength
Pros: Increases overall cooling system capacity; Affordable compared to brand-specific radiators
Cons: Fitment may require modifications; Some reports of weld leaks after extended use
7. Mocal 235-75 Engine Oil Cooler: Best Universal
The Mocal 235-75 is a universal oil cooler that offers bar-and-plate efficiency in a compact package. We found its build quality adequate for most street applications. Owner feedback indicates it works well when properly installed, but the BSP thread standard can be inconvenient for those using AN fittings.
However, the cooler’s performance in sustained high-load conditions is mediocre, with some users noting that it takes longer to cool down after a hard run. If you need a cooler for competitive driving, you may want a larger or more efficient model.
- Universal design for custom installations
- Bar-and-plate core for efficient cooling
- Includes mounting brackets and bolts
Pros: Good cooling for its size; Adaptable mounting options
Cons: BSP ports require adapters for AN fittings; Some users report slow heat soak recovery
Frequently Asked Questions
What type of engine cooler do I need for my car?
The type depends on what you want to cool: engine oil, transmission fluid, or coolant. Oil coolers reduce engine oil temperature, transmission coolers protect the gearbox, and auxiliary radiators help the main cooling system. Consider your driving conditions and vehicle usage.
How do I install an engine oil cooler?
Installation typically involves mounting the cooler in front of the radiator or in an area with good airflow, connecting it to the engine’s oil system via a sandwich plate or remote filter mount, and securing hoses. Most kits include instructions, but professional installation is recommended for complex setups.
Can an engine cooler improve performance?
Yes, by maintaining optimal operating temperatures, an engine cooler can prevent power loss due to heat soak and reduce the risk of engine damage. This is especially beneficial for turbocharged, supercharged, or heavily driven vehicles.
How do I choose between bar-and-plate and tube-and-fin coolers?
Bar-and-plate coolers are more efficient and durable, making them ideal for high-performance or racing use. Tube-and-fin coolers are lighter and cheaper but less effective. For daily driving, tube-and-fin may suffice; for track or towing, choose bar-and-plate.
Do I need a thermostat for my oil cooler?
A thermostat helps the oil reach operating temperature quickly before allowing flow to the cooler. Without one, the oil may stay too cold in winter, reducing efficiency. Many kits include or recommend a thermostat for year-round use.
Our Verdict
After researching and comparing, the Mishimoto MMBOC-00 is our top pick for its excellent build quality, comprehensive kit, and proven performance. For a more budget-friendly option, the Hayden 678 offers good value for daily drivers. If you need a transmission cooler with active cooling, the Derale 13750 is a strong runner-up.
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