CIMAC Lubricants Questionnaire 2: 2020 VLSFO Operation
This is a questionnaire from CIMAC* working group Lubricants and is a follow-up to the previous form sent out in Q1 2020. We wish to see how the situation in the industry has developed since the time of the previous survey. However it is not required that you completed the first survey from Q1 to fill in the below form.

The questionnaire and the answers will guide our work for making relevant lubrication guidelines for the marine industry. The answers are fully anonymous, and it is not required that you answer all the questions to send the form.

The previous questionnaire highlighted that scuffing and deposits while operating on VLSFO were key areas of concern, so these two topics form the main focus of this questionnaire. If you have experienced such issues we would be very interested to know more details than can be covered in an online form. If you are willing to be contacted by us for further discussion please send an email to

Content of this Questionnaire:

A: Background Info
B: 2 Stroke: 0.5% S Fuel Operation
C: 2 Stroke: Scuffing
D: 2 Stroke: Deposits
E: Additional Comments

*CIMAC: International Council on Combustion Engines
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What type of fleet do you represent?
What Cylinder oil types are you using for 0.5% S fuel (VLSFO)? (Multiple answers allowed)
Have you seen lube oil related problems when operating 2 stroke main engines with 0.5% S fuel?
Clear selection
If yes, what kind of problems have you experienced? (Multiple answers allowed)
Compared to HFO operation pre-IMO 2020, how frequently do you experience scuffings while operating VLSFO?
Low Frequency
High Frequency
Clear selection
In your opinion what are the main factors involved in scuffings experienced on VLSFO? (Multiple answers allowed)
What is the age of the engine(s) that have been involved in scuffings in your fleet? (Multiple answers allowed)
Are fuel injection timings adjusted by using the fuel quality settings whenever a new fuel comes into use?
Clear selection
Compared to pre-IMO 2020 experience how frequently are deposits in the piston ring pack becoming a serious problem?
Low Frequency
High Frequency
Clear selection
In your opinion what are the main contributing factors to the increased formation of these deposits? (Multiple answers allowed)
Do you have any other comments or issues regarding VLSFO operation? (Open Answer)
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