When selecting an oil cooler thermostat kit for your driveline, the goal is to maintain optimal oil temperature for reliable engine performance and longevity. The Derale 13011 Fluid Control Thermostat Kit stands out as the best overall choice, offering precise temperature regulation and straightforward installation. For those seeking budget-friendly options, the Bevinsee Oil Cooler Thermostat Housing Adapter provides reliable performance at a lower cost, while the Mishimoto MMOP-EXTFC excels in durability and high-temperature handling. The main tradeoffs in this category often revolve around balancing build quality, ease of installation, and price. Keep reading to explore each option in detail and find the best fit for your setup.
Get garage and car supplies delivered free — and shop member deals
- Fast, free delivery on millions of items
- Access to Prime Big Deal Days deals on October 6–7
- Prime Video, Amazon Music and more included
Complete the kit
Key Takeaways
- Top picks vary based on build quality, with premium options like Mishimoto offering better durability for high-performance applications.
- Ease of installation is a significant factor; some kits come with comprehensive fittings and adapters, simplifying the process.
- Price ranges reflect differences in materials and features, with budget options still providing reliable temperature control for everyday use.
- Compatibility with different driveline setups is crucial—some kits suit trucks and heavy-duty vehicles, while others are better for passenger cars.
- Tradeoffs often include additional features versus simplicity—more complex kits offer precise control but may require more technical skill to install.
| Derale 13011 Fluid Control Thermostat Kit, Silver |  | Best Overall for Cold Weather Climates | Material: Silver | Temperature Bypass: 180°F | Rotation: 180° | VIEW ON AMAZON | See Our Full Breakdown |
| Transmission Oil Cooler Radiator Electric Fan Thermostat Switch Kit Heavy Duty Car Truck Engine Towing (180°F On – 165°F Off, 6AN) |  | Best for Versatile Automotive Cooling Control | Color: 180°F On – 165°F Off | Item Weight: 5 ounces | Nominal Wall Thickness: 0.125 inches | VIEW ON AMAZON | See Our Full Breakdown |
| Derale 25791 Fluid Control Thermostat Kit, Silver |  | Best for Engine and Transmission Cold Weather Warm-Up | Controller Type: Push Button | Additional Features: Bypasses cooler at 82°C | Specific Uses: Engine and transmission temperature control | VIEW ON AMAZON | See Our Full Breakdown |
| Oil Cooler Thermostat Sandwich Plate Filter with 10AN Fittings |  | Best for Integrated Oil Filtration and Temperature Control | Function: Oil filtration and temperature regulation | Fitting Size: 10AN | Material: High-precision filter layer | VIEW ON AMAZON | See Our Full Breakdown |
| Derale 25792 Fluid Control Thermostat Kit |  | Best for Versatile Cold Climate Applications | VIEW ON AMAZON | See Our Full Breakdown | |||
| Bevinsee Oil Cooler Thermostat Housing Adapter Upgraded |  | Best Overall for Precision and Durability | Thermostat Opening Temperature: 176°F (80°C) | Material: Billet aluminum | Weight: 2.27 pounds | VIEW ON AMAZON | See Our Full Breakdown |
| Derale 25011 Fluid Control Thermostat Kit, Silver |  | Best for Cold Climate and Flow Flexibility | Temperature: 180°F | Material: Silver | VIEW ON AMAZON | See Our Full Breakdown | |
| Transmission Oil Cooler Radiator Electric Fan Thermostat Switch Kit – Heavy Duty Car and Truck |  | Best for Heavy-Duty and Transmission Cooling | Temperature On: 180°F | Temperature Off: 165°F | Adapter Size: 8AN | VIEW ON AMAZON | See Our Full Breakdown |
| Mishimoto MMOP-EXTFC In-Line Oil Thermostat, Black & Gold |  | Best for Versatile and Precise Fluid Control | Compatibility: Engines, transmissions, driveline systems | Ports: 4x -10AN | Temperature Setting: ~185°F (85°C), with optional 160°F or 200°F units | VIEW ON AMAZON | See Our Full Breakdown |
| oil cooler thermostat kit for driveline | Material |
|---|---|
| Derale 13011 Fluid Control The | Silver |
| Transmission Oil Cooler Radiat | — |
| Derale 25791 Fluid Control The | — |
| Oil Cooler Thermostat Sandwich | High-precision filter layer |
| Derale 25792 Fluid Control The | — |
| Bevinsee Oil Cooler Thermostat | Billet aluminum |
| Derale 25011 Fluid Control The | Silver |
| Transmission Oil Cooler Radiat | — |
| Mishimoto MMOP-EXTFC In-Line O | Billet 6061 aluminum |
More Details on Our Top Picks
Derale 13011 Fluid Control Thermostat Kit, Silver
This thermostat kit stands out for its ability to bypass the cooler at a precise 180°F, making it an excellent choice for vehicles operating in cold climates where quicker engine warm-up is essential. Its 180° rotation feature provides installation flexibility, comparable to the Derale 25792 but with a simpler, straightforward design. The main tradeoff is its fixed bypass temperature, limiting customization for different operating conditions. Unlike the more advanced models, it doesn’t include digital controls or multiple settings, which might be a drawback for those seeking more precise regulation.
BestFor: Drivers in colder regions needing quick warm-up and simple installation.
NotIdealFor: Those wanting adjustable or programmable thermostats for variable conditions.
Pros: Provides faster engine warm-up; Suitable for cold weather climates; Flexible 180° rotation for installation; Simple and reliable design.
Cons: Limited to specific bypass temperature; No detailed compatibility info; Fixed flow direction may restrict some setups.
Verdict: A reliable, straightforward choice for cold weather drivers prioritizing quick warm-up and installation flexibility.
Pros:- Provides faster engine warm-up
- Suitable for cold weather climates
- Flexible 180° rotation for installation
Cons:- Limited to specific bypass temperature
- No detailed compatibility info
Best for: Cold climate vehicle owners needing quick warm-up and flexible installation.
Not ideal for: Users seeking adjustable or digitally controlled thermostat options.
- Material:Silver
- Temperature Bypass:180°F
- Rotation:180°
Our verdict“This kit is ideal for cold weather applications where simplicity and quick warm-up are priorities.”
Transmission Oil Cooler Radiator Electric Fan Thermostat Switch Kit Heavy Duty Car Truck Engine Towing (180°F On – 165°F Off, 6AN)
This universal inline electric fan thermostat switch is designed for a wide range of vehicles, making it a versatile choice for controlling radiator or transmission cooling fans based on fluid temperature. Its 180°F ON and 165°F OFF settings are suitable for maintaining consistent cooling, comparable in function to the Derale 25792 but with the added benefit of controlling electric fans. The main downside is its fixed temperature range, which may not suit all applications, and it requires some mechanical skill to install properly. Unlike simpler thermostats, this unit integrates directly with electrical systems, offering more automation but also added complexity.
BestFor: Owners of trucks, ATVs, or RVs needing reliable fan control across multiple vehicle types.
NotIdealFor: Those seeking adjustable or customizable temperature settings without electrical wiring skills.
Pros: Compatible with various vehicles; Easy to install with standard fittings; Reliable automatic fan control; Suitable for high-torque or towing applications.
Cons: Fixed temperature range limits flexibility; Requires wiring and electrical knowledge; No detailed durability info.
Verdict: A solid, universal fan thermostat ideal for those seeking automated control in diverse vehicle setups.
Pros:- Compatible with various vehicle types
- Easy installation with standard fittings
- Reliable temperature control for cooling fans
Cons:- Limited to specific temperature range
- Requires basic electrical wiring skills
Best for: Vehicle owners needing a dependable, universal fan control switch for various automotive applications.
Not ideal for: Users wanting adjustable or programmable thermostats with advanced features.
- Color:180°F On – 165°F Off
- Item Weight:5 ounces
- Nominal Wall Thickness:0.125 inches
- Outside Diameter:0.38 inches
Our verdict“This switch offers dependable fan control for a broad range of vehicles but lacks flexibility in temperature settings.”
Derale 25791 Fluid Control Thermostat Kit, Silver
The Derale 25791 Fluid Control Thermostat Kit excels in cold climates by bypassing the cooler at 180°F, helping engines and transmissions reach optimal operating temperatures faster. Its 180° rotation feature allows for flexible flow direction, similar to the other Derale kits but with a manual push-button control for simplicity. Its durable aluminum construction and polished finish add to its appeal, yet the lack of digital or automatic features limits its precision and adaptability. Also, the kit relies on wired, manual operation, which might not suit users seeking automated systems.
BestFor: Cold climate drivers who prefer manual control and durable build quality.
NotIdealFor: Those wanting digital or automatic temperature regulation systems.
Pros: Quick engine warm-up; Adjustable flow direction; Durable aluminum and polished finish; Easy to install with bracket mount.
Cons: Limited to manual control; Less suitable for users preferring automated regulation; Few detailed user reviews available.
Verdict: A sturdy, manual control thermostat kit ideal for cold climates but less suited for automation fans.
Pros:- Provides quick engine warm-up
- Adjustable flow direction with 180° rotation
- Durable aluminum construction with polished finish
- Easy to install with bracket mount
Cons:- Limited to manual control
- Less suitable for automated regulation
Best for: Cold weather vehicle owners preferring manual, durable thermostats for engine and transmission warm-up.
Not ideal for: Users seeking automatic or programmable thermostatic control systems.
- Controller Type:Push Button
- Additional Features:Bypasses cooler at 82°C
- Specific Uses:Engine and transmission temperature control
- Temperature Control Type:thermostatic
- Connectivity Technology:Wired
- Voltage:230 volts
Our verdict“This manual, durable thermostat kit suits cold climate users who prefer straightforward, reliable operation.”
Oil Cooler Thermostat Sandwich Plate Filter with 10AN Fittings
This sandwich plate filter combines oil filtration with temperature regulation, making it ideal for maintaining clean oil at optimal temperatures. Its built-in thermostat automatically manages flow, similar in function to the standalone thermostats but with the added benefit of debris filtration, which can extend the lifespan of your oil cooler system. Supporting 10AN fittings, installation is straightforward for systems designed to accommodate this size. However, its complexity may require technical skill, and compatibility is limited to systems supporting 10AN fittings, potentially excluding some setups.
BestFor: Those wanting a dual-function unit that filters and regulates oil temperature in performance or heavy-duty applications.
NotIdealFor: Users with systems incompatible with 10AN fittings or seeking simple, standalone thermostats.
Pros: Combines filtration and temperature regulation; Supports easy inline installation; Built-in thermostat for automatic control; High-quality filtering traps debris.
Cons: Installation may be complex for novices; Compatibility limited to 10AN systems.
Verdict: An efficient, integrated solution for users needing both oil filtration and temperature regulation in one unit.
Pros:- Combines filtration and temperature regulation
- Supports easy inline installation
- Built-in thermostat for automatic operation
- High-quality debris trapping filter
Cons:- Installation may be complex for non-experts
- Limited compatibility to 10AN fittings
Best for: Performance-oriented or heavy-duty vehicle owners seeking combined filtration and temperature control.
Not ideal for: Casual users or systems without 10AN fitting support.
- Function:Oil filtration and temperature regulation
- Fitting Size:10AN
- Material:High-precision filter layer
Our verdict“This sandwich plate filter is ideal for those needing a dual-function oil management solution in compatible systems.”
Derale 25792 Fluid Control Thermostat Kit
The Derale 25792 Fluid Control Thermostat Kit is designed to bypass the cooler at 180°F, helping engines and transmissions reach optimal temperature faster in cold conditions. Its rotatable 180° flow direction offers installation flexibility, similar to other Derale models, but this version emphasizes versatility for various applications. The setup relies on manual control and simple design, which might be less appealing for those wanting automated or digital regulation. Its limited information on durability and installation instructions suggests it’s best for users comfortable with basic mechanical setups.
BestFor: Cold climate vehicle owners seeking a reliable, flexible bypass thermostat with manual control.
NotIdealFor: Those needing automated or highly customizable systems.
Pros: Quicker warm-up in cold weather; Reversible flow direction; Durable, simple construction; Reusable 180° rotation.
Cons: Limited info on durability; Manual operation only; No digital or automatic features.
Verdict: A straightforward, flexible thermostat kit suitable for cold climates but lacking automation.
Pros:- Provides quicker engine warm-up
- Reversible flow direction
- Flexible installation with 180° rotation
Cons:- Limited durability info
- Manual operation only
Best for: Cold climate drivers preferring manual, flexible bypass thermostats.
Not ideal for: Users seeking automated or digitally controlled systems.
Our verdict“This kit offers reliable, manual bypass control for cold climates, ideal for straightforward setups.”
Bevinsee Oil Cooler Thermostat Housing Adapter Upgraded
This billet aluminum thermostat housing stands out for its high-precision CNC machining, ensuring a perfect fit and reliable temperature regulation at 176°F. Compared to the Mishimoto MMOP-EXTFC, it offers a more straightforward setup for aftermarket cooler systems but is limited to aftermarket configurations, not compatible with factory lines. Its corrosion-resistant anodized surface enhances longevity, making it ideal for enthusiasts seeking durability. However, it doesn’t fit factory oil lines, so it’s less suitable for OEM upgrade projects. This pick is best suited for those installing aftermarket oil coolers who prioritize precise control and long-term reliability.Pros:- High-precision CNC machined for a perfect fit
- Durable billet aluminum construction
- Corrosion-resistant anodized surface
- Compatible with aftermarket oil coolers and AN10 lines
Cons:- Not compatible with factory oil line kits
- Limited to aftermarket cooler setups
Best for: DIYers and performance enthusiasts upgrading aftermarket oil cooling systems in BMW models
Not ideal for: Owners aiming for simple OEM replacements or factory line compatibility
- Thermostat Opening Temperature:176°F (80°C)
- Material:Billet aluminum
- Weight:2.27 pounds
- Dimensions:8.27 x 4.72 x 3.94 inches
- Replacement Part Numbers:11427573212, 11 42 7 573 212, 11428637820, 11 42 8 637 820, 11427525335, 11 42 7 525 335
Our verdict“This housing is best for those installing aftermarket oil cooling solutions who need durability and precise temperature control.”
Derale 25011 Fluid Control Thermostat Kit, Silver
The Derale 25011 offers a simple yet effective way to manage oil flow, bypassing the cooler until 180°F, which helps engines warm up faster in cold conditions. Unlike the Mishimoto, which is more suitable for engine and driveline fluids, this kit focuses on maintaining consistent pressure and flow during cold starts. Its ability to rotate 180 degrees for flow direction adds flexibility for custom installations, but its limited temperature range makes it less adaptable for broader applications. This choice makes sense for drivers in colder climates who need quick warm-up times and reliable flow control without complex adjustments.Pros:- Ensures quicker warm-up in cold weather
- Maintains a constant pressure system
- Can be rotated 180 degrees for flexible flow direction
Cons:- Limited to specific temperature range
- Requires installation knowledge
- Only suitable for compatible systems
Best for: Cold climate drivers and those needing flexible flow direction in their oil cooling setup
Not ideal for: Users seeking a broad temperature range or applications outside cold weather conditions
- Temperature:180°F
- Material:Silver
Our verdict“This thermostat kit is ideal for cold climate applications where quick warm-up and flow control are priorities.”
Transmission Oil Cooler Radiator Electric Fan Thermostat Switch Kit – Heavy Duty Car and Truck
Designed for heavy-duty vehicles, this electric fan thermostat switch automatically activates at 180°F to regulate transmission or radiator oil temperatures. It offers a straightforward installation with AN adapters and barb fittings, making it suitable for a variety of vehicle setups. While it simplifies cooling management, its fixed activation points mean it lacks the fine-tuning options found in the Mishimoto or Bevinsee housing. This product is best suited for trucks or performance vehicles where transmission cooling is critical and simplicity is valued over adjustable control.Pros:- Automatically controls fan activation based on temperature
- Universal fit for most vehicles
- Easy to install on transmission or radiator hoses
- Reliable for heavy-duty applications
Cons:- Limited to 180°F/165°F settings
- May require additional wiring or hardware
- Compatibility depends on vehicle hose sizes
Best for: Heavy-duty trucks or performance vehicles needing reliable automatic fan control
Not ideal for: Light vehicles or users requiring adjustable or precise temperature regulation
- Temperature On:180°F
- Temperature Off:165°F
- Adapter Size:8AN
- Fitting Type:Barb push-on hose fittings
Our verdict“This switch kit is best for heavy-duty applications where automatic fan control at a set temperature is needed for transmission or radiator cooling.”
Mishimoto MMOP-EXTFC In-Line Oil Thermostat, Black & Gold
The Mishimoto in-line thermostat offers adjustable temperature settings around 185°F, with options for 160°F or 200°F units, making it highly versatile. Its billet 6061 aluminum construction and heat sink design provide excellent durability and heat dissipation, making it suitable for engine oil, transmissions, or driveline fluids. Compared to the Bevinsee housing, it’s more adaptable to various applications and space-constrained environments thanks to its compact design. However, proper installation is essential to prevent leaks, and it may be overkill for simple cooling setups. This product is best for those who want customizable, precise temperature control across multiple fluid systems.Pros:- Precise temperature regulation for various fluids
- Durable billet aluminum with heat sink design
- Easy to install in tight engine bays
- Adjustable temperature options for customization
Cons:- Requires proper installation to prevent leaks
- Limited to -10AN fittings applications
- May be excessive for basic cooling needs
Best for: Engine builders or custom hot rod projects requiring adjustable temperature regulation in tight spaces
Not ideal for: Casual users or those with straightforward cooling needs who prefer plug-and-play solutions
- Compatibility:Engines, transmissions, driveline systems
- Ports:4x -10AN
- Temperature Setting:~185°F (85°C), with optional 160°F or 200°F units
- Material:Billet 6061 aluminum
- Fittings:Dowty seal fittings
- Mounting:Universal mount bracket
Our verdict“This thermostat is best suited for enthusiasts seeking customizable and precise control in complex or space-limited setups.”
How We Picked
The products in this roundup were evaluated based on several key criteria: build quality, ease of installation, temperature control accuracy, compatibility with various driveline configurations, and overall value. We prioritized kits that provide reliable and consistent temperature regulation, as this directly impacts engine longevity and performance. Ease of use was also a major factor, especially for DIY enthusiasts. Products were ranked by balancing these factors, with higher emphasis on durability and functionality for demanding applications, such as towing or high-performance driving.| oil cooler thermostat kit for driveline | Material |
|---|---|
| Derale 13011 Fluid Control The | Silver |
| Transmission Oil Cooler Radiat | — |
| Derale 25791 Fluid Control The | — |
| Oil Cooler Thermostat Sandwich | High-precision filter layer |
| Derale 25792 Fluid Control The | — |
| Bevinsee Oil Cooler Thermostat | Billet aluminum |
| Derale 25011 Fluid Control The | Silver |
| Transmission Oil Cooler Radiat | — |
| Mishimoto MMOP-EXTFC In-Line O | Billet 6061 aluminum |
Factors to Consider When Choosing Oil Cooler Thermostat Kit For Driveline
Selecting the right oil cooler thermostat kit for your driveline involves understanding several critical factors. Beyond just fitting your vehicle, the right kit should offer precise temperature control, durability under operating conditions, and ease of installation. Knowing what to prioritize can help you avoid common pitfalls like incompatible fittings or insufficient temperature regulation. This guide covers four key considerations to help you make an informed choice.Compatibility and Fitment
Ensuring the thermostat kit is compatible with your specific vehicle and driveline setup is foundational. Some kits are designed for certain pipe sizes or engine configurations, so verify dimensions and fittings before purchasing. An incompatible kit can lead to leaks or improper temperature regulation, compromising engine health. Always check manufacturer specifications and consider whether additional adapters or fittings are needed for your application.
Material and Build Quality
The durability of the thermostat and fittings directly impacts long-term reliability. High-quality materials like stainless steel or billet aluminum resist corrosion and withstand high temperatures better than cheaper plastics or softer metals. Investing in a robust build can prevent failures that lead to oil leaks or thermostat malfunction, especially in demanding conditions like towing or heavy-duty use. However, premium materials often come at a higher cost, so balance your budget with your performance needs.
Temperature Range and Control
Different driving conditions require different temperature settings. Some kits offer adjustable thermostats, allowing you to fine-tune when the oil flow is regulated. Precise temperature control ensures your engine runs efficiently without overheating or running too cold, which can affect lubrication and performance. Consider your typical use—whether daily driving, towing, or racing—and choose a kit with an appropriate temperature range.
Ease of Installation and Maintenance
A kit with comprehensive fittings, clear instructions, and minimal complexity reduces installation time and potential errors. Some kits include all necessary adapters, while others require additional parts. Ease of maintenance—such as straightforward access to replaceable components—can save time and effort over the lifespan of the setup. For DIY installers, simplicity and clear documentation are key factors to consider.
Price and Overall Value
While budget options can be tempting, they may sacrifice durability or precise temperature control. Conversely, premium kits often include extra features or higher-grade materials, justifying their higher price point for serious enthusiasts or commercial applications. Assess your specific needs and expected usage to determine whether investing in a higher-end kit will provide long-term savings through fewer replacements and better performance.
Frequently Asked Questions
How do I know if a thermostat kit is compatible with my vehicle?
Compatibility depends on factors like pipe diameter, fitting types, and engine configuration. Check the product specifications for size details and ensure they match your vehicle’s oil lines and fittings. If your setup is custom or unusual, consider kits with adjustable fittings or consult with the manufacturer or a professional installer to confirm compatibility. Proper fitment is essential to prevent leaks and ensure reliable operation.
What is the ideal temperature range for an oil cooler thermostat in a driveline?
The optimal temperature range depends on your vehicle and usage. Typically, a range between 180°F to 200°F is suitable for most passenger cars and light trucks, balancing oil flow and engine protection. For high-performance or towing applications, slightly higher or adjustable thermostats may be preferable to accommodate increased heat. Always choose a thermostat that allows you to maintain consistent oil temperatures within your engine’s safe operating limits.
Are adjustable thermostats worth the extra cost?
Adjustable thermostats provide the flexibility to fine-tune oil temperature settings, which can be beneficial for different driving conditions or performance goals. They are especially useful if you have a custom setup or operate in variable environments. However, they tend to be more complex and slightly more expensive. If consistent, preset temperature regulation suffices for your needs, a fixed thermostat may be a more straightforward and cost-effective choice.
Can I install an oil cooler thermostat kit myself?
Many kits are designed for DIY installation, especially those with comprehensive fittings and clear instructions. Basic mechanical skills, a few hand tools, and patience are usually enough. However, some setups requiring modifications to oil lines or precise fitting may benefit from professional installation to ensure proper sealing and function. Consider your comfort level and the complexity of the kit before attempting installation yourself.
How often should I inspect or replace my oil cooler thermostat kit?
Regular inspection is recommended during routine maintenance, especially if you operate under demanding conditions like towing or high-performance driving. Look for signs of leaks, corrosion, or inconsistent operation. Replacement intervals depend on usage and build quality but checking the thermostat annually or every 15,000 miles is a good practice. Prompt replacement of worn or damaged parts helps prevent oil flow issues and potential engine damage.
Conclusion
For most users, the Derale 13011 Fluid Control Thermostat Kit offers the best combination of reliability, ease of installation, and precise temperature regulation, making it ideal for daily drivers and enthusiasts alike. Those on a tighter budget might find the Bevinsee Oil Cooler Thermostat Housing Adapter to be a practical choice that balances cost and function. For high-performance applications or heavy-duty towing, investing in the Mishimoto MMOP-EXTFC provides greater durability and temperature stability. Beginners should prioritize kits with comprehensive fittings and straightforward installation, while experienced users with specific needs may prefer adjustable thermostats for fine control. Ultimately, selecting the right kit depends on your vehicle, usage, and performance expectations.
Fall Picks
fall essentials
As an affiliate, we earn on qualifying purchases.
