Product information

This product supersedes product no: 555755

The Unitorâ„¢ Oil Compatibility Tester is the perfect way to make sure your delivery of your VLSFO fuel is stable and compatible. The Tester shows you if the fuel is in danger from asphaltenic sludge formation. It also provides a quick and easy tool for understanding fuel compatibility necessary to mix or blend residual fuel oil. Ultimately, it will give you a quick picture about the stability and compatibility of your fuel.


  • Small and compact, completely portable
  • Specifically designed for onboard use
  • No reagents, no glassware, disposable sample containers and No cleaning
  • Complete with guide on methods to prevent sludging


  • Portable, easy to use and suitable to work onboard the vessels
  • Results can be used to determine if pre combustion additives are required and to assess dose rate
  • Confirm that the fuel delivery will remain stable in the bunker tanks
  • Identify possible stability problems before mixing two fuels
  • Help prevent sludge deposits, failure of fuel handling systems and costly combustion related engine damage