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Muehlhan GroupMuehlhan Group
services/specialty/oil exchange
Expert wind turbine oil change and maintenance services

Through our subsidiaries Renewable Oil Services and Peter Lonsdorfer GmbH & Co. KG (part of the Muehlhan Wind Service family), we offer a high-quality oil exchange business unit specializing in wind turbine oil change and maintenance services across Europe. 

Our skilled technicians perform gearbox oil, hydraulic oil, and glycol coolant exchanges using purpose-built oil pump trucks and offshore containerized units. The result: optimal turbine performance, extended component life, and minimal downtime — all completed to the highest HSEQ standards.

Minimize downtime, maximize performance

We help operators maintain oil cleanliness and turbine efficiency while achieving the shortest possible service time. Our specialized oil pump trucks and offshore exchange units are designed to deliver fast, safe, and clean operations.

Oil and coolant change

We perform precise gearbox and hydraulic oil exchanges as well as glycol coolant replacements to maintain turbine reliability and prevent overheating. Each process includes inspection, flushing, and circulation testing to ensure stable, efficient operation.

Whether onshore or offshore, our teams operate with specialized equipment, including rough-terrain oil pump trucks and offshore exchange containers, designed for safe, efficient servicing in all conditions.

Oil cleaning, filtration and drainage

We use advanced filtration and monitoring techniques to extend oil life, reduce wear, and enhance turbine efficiency. When oil must be drained or replaced, our technicians handle tank emptying safely and in full compliance with environmental standards, performing corrosion checks and validating system integrity.

Our expertise also includes transformer oil exchange and cleaning, ensuring reliable performance and protection for every asset.

Oil delivery and waste management

From sourcing high-quality oil and coolants to coordinating delivery in challenging locations, our logistics team ensures every step is executed safely and on schedule.

We handle waste oil collection, transport, and disposal responsibly, following strict environmental regulations. Combined with full-scope project management, covering HSEQ, stakeholder coordination, and waste management, we deliver a seamless, compliant process from start to finish.

Documentation and quality assurance

Every project includes comprehensive documentation and reporting, covering oil conditions, exchange procedures, and HSEQ compliance. This ensures full traceability and consistent quality across all sites and assets.

The world is our workplace

Wherever the wind takes us, we deliver trusted service, skilled teams, and lasting results for the global wind industry — driving a cleaner, more sustainable tomorrow.

Why partner with MWS?
01.
Proven expertise in oil exchange

Our oil exchange capabilities are powered by the expertise of Lonsdorfer and Renewable Oil Services (ROS) — both part of the MWS family.

Lonsdorfer pioneered the first professional gearbox oil exchanges on wind turbines, setting the industry standard for quality and precision. ROS added advanced offshore capability with custom-built trucks and filtration systems designed for efficient, and contamination-free oil management. Together, they bring decades of specialized experience that keep turbines running reliably around the world.

02.
Certified technicians and site managers

Skilled professionals trained in the latest mechanical, electrical, and HSEQ standards to ensure quality and safety.

03.
Efficient project execution

From pre-assembly to commissioning, we deliver every phase on time, within budget, and to OEM specifications.

04.
Flexible manpower and logistics

Scalable teams and equipment tailored to each site’s requirements for smooth coordination and minimal downtime.

05.
Global standards, local precision

We bring consistent quality and compliance to every onshore and offshore project — wherever the wind takes you.

Spin the globe, discover our work

Explore 500+ completed wind projects across three continents and find your inspiration on our interactive map.

Explore our projects around the globeExplore our projects around the globe
We keep the oil and the collaboration running smoothly
Customer retention
90%
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"MyteamhadnothingbutpraiseforROS/MWS.Therewerenosafetyconcernsordelays,aresultoftheirprofessionalismandpositiveattitude."
Service Manager, Northern Region – Siemens Gamesa
Keep your turbines smooth and safe

Get in touch with our Oil Exchange team today to plan your next wind turbine oil change or maintenance campaign and experience the precision, reliability and quality MWS is known for. Contact us today.

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Commercial Manager - Oil Exchange, ​EMEA
Monika Konieczna
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