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A high-performance BMW oil system is essential for maintaining optimal engine temperature, lubrication, and longevity, especially under high-performance and track conditions. Common issues such as oil overheating, pressure drops, leaks, and sludge buildup can lead to engine wear, reduced efficiency, and potential failure. Upgrading to high-performance BMW oil system components, including high-capacity oil coolers housing, thermostats, or low oil temperature kits ensures superior oil cooling, improved lubrication, and reduced engine heat soak. These upgrades help prevent oil starvation in high-G turns, minimize sludge accumulation, and enhance overall engine durability and performance. Whether pushing your BMW on the track or ensuring long-term reliability for daily driving, Turner Motorsport offers premium OEM and performance BMW oil system components to keep your engine running at peak efficiency.

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N54 & E8x/E9x N55 Mosselman Billet Oil Thermostat

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Gasket/Install kit see T#4799665

T#:4621131

Part#: OTN54.T85

In Stock

$ 379.99 USD

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$ 379.99 USD

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The N54 engine is no stranger to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius. Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is recommended to install the thermostat, especially for cars that are tuned.

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N54/N55 Low Temp Oil Thermostat Kit - 70c

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:52621839

Part#: 008731KT1

In Stock

Sale - Save 23% $ 74.98

This product was last offered at the strikethrough price on
05-03-2026

$ 57.74 USD

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Qty

Sale - Save 23%

$ 74.98

This product was last offered at the strikethrough price on
05-03-2026

$ 57.74 USD

Add to Wish List

Upgrade your stock oil cooler thermostat for improved performance. Swap your factory 110-degree Celsius thermostat for a new 70-degree Celsius version for faster oil flow and extended temperature control. With oil temperatures reaching 230 degrees Fahrenheit by the time your factory thermostat opens, initiating oil flow at lower temperatures proves more effective than attempting to cool down already elevated temperatures.

Utilizing a factory-style thermostat, this upgrade can be used in all weather conditions and allows your engine to warm up properly, unlike thermostat bypass kits.

Kit contents:

Lower temperature thermostat - 70c (158F) vs Factory 110c (230F)
Low temp thermostat spring

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70c Low Temp Oil Thermostat Kit - N54/N55

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:30031507

Part#: N54N55LTKT1

Back Ordered

Sale - Save 18% $ 152.97

This product was last offered at the strikethrough price on
05-03-2026

$ 125.58 USD

Add to Wish List

Qty

Sale - Save 18%

$ 152.97

This product was last offered at the strikethrough price on
05-03-2026

$ 125.58 USD

Add to Wish List

Upgrade your stock oil cooler thermostat for improved performance. Swap out your existing cover with ease, replacing it with a durable billet cover. Upgrade from your 110-degree Celsius thermostat to a new 70-degree Celsius version for faster oil flow and extended temperature control. With oil temperatures reaching 230 degrees Fahrenheit by the time your factory thermostat opens, initiating oil flow at lower temperatures proves more effective than attempting to cool down already elevated temperatures.

Utilizing a factory-style thermostat, this upgrade can be used in all weather conditions and allows your engine to warm up properly unlike thermostat bypass kits.

Kit contents:

Billet thermostat housing cover
Replacement gasket
Hardware
Lower temperature thermostat - 70c (158F) vs Factory 110c (230F)
Low temp thermostat spring

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N54 & E8x/E9x N55 Mosselman Billet Oil Thermostat

N54/N55 Low Temp Oil Thermostat Kit - 70c

70c Low Temp Oil Thermostat Kit - N54/N55

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