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Mark Hendrikx - Automotive engineer at Mosselman

Expert's advice:

The S55 engine is no stranger to oil cooling problems, that’s why we developed the MSL Oil Thermostat. A highly recommended upgrade for the S55 engine, especially when it’s tuned. Instead of opening at 105°C, the MSL Oil Thermostat opens at 85°C which results in a operational oil temperature 20°C lower than OEM. The MSL Oil Thermostat allows the engine to reach operating temperature in the same time as a stock thermostat. It’s made from a solid block of high-grade aluminium at our own facility and takes only 30 minutes to install.

Mark Hendrikx - Automotive engineer at Mosselman



The next level of temperature control

  • 20°C Lower Than Stock
    Operating temperature 20°C lower than stock.
  • Real Thermostat
    Equipped with a real thermostat, not an always open solution. (for use in hot and cold climates)
  • Quick Installation
    Takes only 30 minutes to install.
Read more about the oil thermostat

MOSSELMAN tuning experiences

  • Anders M.

    With Mosselmans' performance package I exceeded even more than the company advertised on their website! The information sharing process was easy and hassle-free. Excellent customer service from Leon and his team!

    Anders M.

  • Thom H.

    Mosselman tuned my BMW 318d today. What a result, it became a completely different car! Very professional company and friendly staff. This was my second car here and again they have exceeded my expectations. Thanks!

    Thom H.

  • Rob M.

    Very happy with my improved car, the car reacts better on the throttle and is very direct. Also, the exhaust sounds better!

    Rob M.

  • Bas H.

    Visited Mosselman on May 24th for the chip tuning of my 135i, great result! The adjustment is great, when will you post the photo on FB :)?

    Bas H.

  • Romke B.

    After 1,5 years still very happy with my iTronic. By far the best upgrade I could have done with my BMW 340i.

    Romke B.