Looking for an oil cooler sandwich plate adapter to improve engine cooling and oil flow? This guide focuses on five top options that suit different setups—from universal fitments to thermostatic control. The right choice helps improve oil temperature management for performance engines, daily drivers, and high-load applications. Each product section explains who it’s best for, why it was selected, and any notable limitations to consider. A quick comparison table below highlights key details to help you decide at a glance.
| Product | Best For | Key Note |
|---|---|---|
| HEROFFIX | Most vehicles needing multiple adapter sizes | 3 ports for sensors/feeds |
| PiKBUK | Thermostatic control with universal AN10 | 82°C thermostat option |
| Mishimoto | General oil temperature regulation | Universal fit with dual ports |
| Aramox | Compact, high-fit aluminum plate | 10AN piping, robust anodized finish |
| GlowShift | Sensor integration between engine and filter | Includes sensor ports and plugs |
HEROFFIX Oil Cooler Sandwich Plate Adapter
Features: Universal fit with M18x1.5, M20x1.5, M22x1.5, and 3/4-16 threads. Three 1/8″ NPT ports for sensor or oil feed connections. Constructed from aluminum alloy with anodized finish for heat dissipation and corrosion resistance.
Best for: A broad range of vehicles requiring a versatile, multi-thread adapter. This adapter is ideal when engine setups vary and you need to accommodate multiple thread sizes in one plate.
Why chosen: The three-port capability simplifies sensor and line routing, while the universal sizing boosts compatibility. The aluminum construction aids heat management in demanding conditions.
Caution: Engine oil filter mount thread size must be measured to confirm fitment; incorrect sizing can prevent proper installation.
PKSABB Universal Oil Cooler Thermostat Sandwich Plate Adapter
Features: Includes 3/4X16 UNF and M20X1.5 adapters for most vehicles. Made from ultra-light 6061 aluminum. Inlet and outlet fittings rated for AN10 oil filter connections with 3/4-16 UNF threads and M20X1.5 compatibility.
Best for: Drivers seeking thermostatic control with a compact, lightweight plate and broad compatibility.
Why chosen: The thermostatic option helps manage oil temperature by routing flow based on temperature, supporting both warm-up and cooling phases.
Caution: Ensure the plumbing and sensor routing align with your vehicle’s oil circuit to avoid leaks or routing conflicts.
Mishimoto MMOP-SP Oil Sandwich Plate
Features: Universal fitment for oil temperature regulation. Size about 3.15” x 2.8” x 1.11”. Ports: M20 x 1.5. Made from 6061 aluminum with two 1/8″ NPT ports and plugs for sensors or oil feeds.
Best for: Enthusiasts seeking a durable, widely compatible plate that supports sensor additions and oil temperature control.
Why chosen: Mishimoto’s compact design and standard porting provide a straightforward upgrade path for many performance builds.
Caution: Sensor port usage requires careful gasket and seal alignment to prevent leaks in tight spaces.
Aramox M20 x 1.5 Universal Aluminum Plate
Features: Inlet size 10AN/outlet 10AN. Sensor insertion thread size 1/8NPT. Bypass port mounting nut size 3/4-16 UNF; M20 x 1.5 on other ports. Anodized aluminum for durability and heat dissipation.
Best for: Builds needing robust aluminum construction with reliable 10AN connections and broad compatibility.
Why chosen: The combination of 10AN plumbing and M20x1.5 compatibility provides flexible high-flow options for performance setups.
Caution: Check gasket diameter and mounting clearance to ensure fitment with your oil filter housing.
Buying Guide
What should I consider before buying an oil cooler sandwich plate?
Assess your engine’s oil cooling needs, including desired temperature range, whether you want thermostatic control, and how many sensor ports you need for monitoring oil pressure and temperature.
Which thread sizes are most common?
Common sizes include M18x1.5, M20x1.5, M22x1.5, and 3/4-16 UNF. Confirm your engine’s oil filter mount threads before purchasing to ensure compatibility.
What about sensor integration?
Choose plates with built-in ports or extra ports (1/8″ NPT or similar) if you plan to add oil pressure or temperature sensors for real-time monitoring.
Material and durability considerations?
Most sandwich plates are aluminum, often anodized for corrosion resistance and heat dissipation. Lightweight aluminum reduces weight while maintaining strength for under-hood use.
Should I select a thermostatic version?
A thermostatic plate directs oil flow to the external cooler when the oil reaches a set temperature, improving warm-up performance and overall cooling efficiency for high-load driving or track use.
Installation tips
Always verify thread pitch and seal with appropriate gaskets or O-rings. Avoid overtightening to prevent mounting damage or leaks. Plan routing to minimize hose tension and heat exposure near hot exhaust components.
FAQ
What is a sandwich plate adapter?
A sandwich plate sits between the engine block and the oil filter to introduce ports for oil sensors or a cooling circuit.
Do I need a thermostatic option?
Thermostatic versions help regulate flow based on oil temperature, beneficial for maintaining stable oil pressure and temperature during different driving conditions.
How many ports are typical?
Most options offer one to three ports for sensors or oil feeds; verify the number and size to fit your setup.
Will these fit all vehicles?
Fit depends on thread size compatibility with your engine’s oil filter mount; measure your threads before buying.
Are there any common installation pitfalls?
Leaks from gasket seals, misaligned threads, or hose routing tension are typical issues—double-check seals and routing during install.
Can I install multiple adapters on a single engine?
Some setups allow daisy-chaining multiple adapters if routing and space permit; ensure clearance and avoid interference with belts and hoses.