About us

Customer satisfaction is our top priority.

OELCHECK is the leading laboratory for lubricant and fuel analyses in Europe. Customers from every industry appreciate OELCHECK's reliability and skill. In modern maintenance and upkeep, OELCHECK analyses are indispensable.


In 1991, Barbara and Peter Weismann founded the company in Brannenburg under the name WEARCHECK. It was renamed OELCHECK in 2009. The company is still a 100% family-run business today and is therefore completely independent.




Since 1991, the number of employees has grown from 2 to over 70. The samples we receive, which number up to 2,000 per day, coming into the laboratory from over 30,000 customers and counting, are investigated using more than 90 analysis methods and diagnosed by experienced engineers within 24 hours. The lab reports are available in several languages. In 2013, an additional lab was opened in Guangzhou, southern China, which has since been certified and accredited. Our engineers in Germany comment on the values collected there by means of a shared database.

Customers from over



Up to


samples per day


In our oil analytics laboratories in Brannenburg and Guangzhou, we rely constantly on innovative oil analysis equipment, the latest software and diligent, experienced staff. These allow us to supply a report with a meaningful diagnosis within 24 hours for every sample analysed. Only a perfect interplay between people and equipment and consistent integration into an in-depth quality management system can create structures and processes for the future-forward development of our company.


of our customers would recommend OELCHECK
according to our 2016 survey.

"When we founded our company, our aim of a business focused on oil analyses was just a vision. Sooner than expected, it became a real business. Since 1991, OELCHECK has been on a consistent course towards expansion. Yet we have had other visions and new ones have joined them. Together with our employees, we make these visions a reality and constantly offer our customers new services which they can benefit from directly."

Barbara Weismann
Managing Director


Our database currently includes more than 3 million lubricant and fuel samples. The oil, lubricant, fuel and coolant samples come from every industry, such as wind turbines, construction and agricultural machinery, gas, diesel and petrol engines, hydraulics, industrial transmissions, oil circulation systems, turbines, compressors, power station facilities and transformers. On average, we receive up to 2,000 further samples every single day.



customers have had their samples analysed over 25 years.

We added over


in 2015 alone.