Mishimoto Thermostatic Oil Cooler 14-16 Ford Fiesta ST

Mishimoto Thermostatic Oil Cooler 14-16 Ford Fiesta ST reduces oil overheating for the 1.6L EcoBoost in track or aggressive street use by adding thermostatic oil cooling control that helps maintain oil temperature under high-stress conditions.

Turbocharged, high-stress 4-cylinder engines such as the Fiesta ST’s 1.6L EcoBoost can push oil temperatures rapidly within a few laps or during sustained aggressive driving. Even with the stock liquid-to-liquid heat exchanger, the engine may still run hot and risk oil overheating. This Mishimoto thermostatic oil cooler is engineered to address that specific thermal challenge by introducing controlled, supplemental oil cooling when needed.

Technical features and their benefits

• Thermostatic operation — Provides controlled oil flow to the cooler only when oil reaches the thermostat threshold, ensuring the engine oil reaches and maintains optimal operating temperature without unnecessary overcooling.
• Application-specific design for 2014–2016 Fiesta ST — Tailored fit and integration for the 1.6L EcoBoost installation, reducing installation complexity and ensuring compatibility with the vehicle’s existing cooling architecture.
• Targeted solution for turbocharged 4-cylinder engines — Addresses the rapid oil temperature rise common to turbocharged setups during track sessions or heavy street use, preserving oil viscosity and engine reliability.
• Mishimoto engineering and support — Designed and validated by Mishimoto, a brand focused on motorsports-grade cooling solutions, providing a product developed with performance-minded applications in mind.

The cooler supplements the Fiesta ST’s factory cooling system to reduce the likelihood of oil-related performance loss or accelerated wear during sustained high-load operation. Its thermostatic control keeps oil at a working temperature range appropriate for turbocharged operation rather than continuous maximum cooling, which can be detrimental in some conditions.

Use this cooler as part of a broader cooling strategy when planning track days, turbo upgrades, or any sustained high-load driving where oil temperature management is a core reliability concern.

Contents:

• 1 Mishimoto thermostatic oil cooler kit