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Oil Check Laboratory Services Joins POLARIS Laboratories® (Apr 2026)
At Oil Check Laboratory Services (OCLS), we’re pleased to share an exciting new chapter for our business as we officially join POLARIS Laboratories®, a global leader in fluid analysis and condition monitoring....
Engine Oil & Diesel Fuel Solutions
A full range of oil analysis and testing methods are available for all kinds of industries and equipment including but not limited to, Mining equipment, Road & Rail transport, Construction equipment and Marine vessels.
OCLS, also provide fuel solutions, tank cleaning, tank repairs & filtration equipment from static units for large tanks, to mobile units for use in the field, plus oil analysis kits and fluid conditioning products for any oil condition monitoring or predictive maintenance solutions.
Why Choose Us?
OCLS are a modern lubricant analysis and diesel fuel testing laboratory, based in South Yorkshire, Doncaster.
We are proud of our independent status and are staffed by experienced technicians, who can be relied upon for unbiased and an informative prognosis of all oils, diesel fuels and lubricants.
Oil Condition Monitoring Programmes!
Used oil analysis is by far the most cost effective method of condition monitoring your equipment. It will assist with warranty issues and is an essential part of root cause failure analysis.
Closely monitoring your engines with an OCLS programme will provide fast and precise information on your machines condition. A scheduled analysis of engine oils, greases or hydraulic fluids can provide evidence on the level of wear or the detection of defect parts before major downtime and costly failures happen.
“Fly High with Oil Check!”
We here at OCLS are very proud to be able to sponsor the Avro Lancaster NX611 “Just Jane”. Which is currently being restored to airworthiness by the Lincolnshire Aviation Heritage Centre.
You can find out more about Just Jane and just how you can help all the amazing work preformed by the Lincolnshire Aviation Heritage Centre; by clicking on the link below.
Your help and speedy assistance has been invaluable with regards this issue and won’t be forgotten
Much appreciated
As a side note we will be undertaking annual oil testing on ALL our cranes that are under contract.
Speed of Turnaround
To send a sample on Saturday and have the results on my desk on Monday is unbeatable!
5 out of 5
Thank you Mike, you can put 5 out of 5 on all the domains.
Excellent work.
What We Offer
- Engine oil and fuel analysis
- Diesel fuel filtration
- Oil Condition Monitoring Programmes!
- Diesel fuel testing and lubricant issues?
- 48 Hour Turnaround
Common Equipment We Test
- Diesel engine oil analysis
- Transmissions
- Gearbox oil testing
- Final drives
- Industrial gearboxes analysis
- Compressors
- Blowers
- Fans
- Electric Motors
- Pump testing
- Turbines
- Chillers
- Cooling systems
- Diesel Fuel Systems
- Greased Bearing
- Hydraulics testing
Oil Testing Kits
For those experienced in oil analysis, we have a full suite of fuel and oil tests and oil analysis kits for individual needs, large or small.
OCLS give you more than a simple analysis service – you buy into an arrangement that includes consultation and Full support.
Renewable Energy Support
Wind Turbines both on and Offshore.
Offshore support vessels themselves as part of a cost reduction program.
Steam & Gas Turbine Support
As part of the support for GT & ST’s, Varnish potential is monitored using ASTM D7843
OCLS analysis report key
What to expect in our analysis reports
Access Your Online Database
Your Fuel and Oil Testing Suite