winsbury
New member
The modern lubrication requirements of a 1986 diesel BUKH DV20 engine and gearbox are perplexing... searching these forums and reading the manuals, wiki and https://coxengineering.sharepoint.com/Pages/Oilforyachtengines.aspx etc., have not helped much so here's the thinking so far:
Bottom line is which is the right oil to put into the engine and gearbox of my aged engine to give it maximum life ?
- modern (red) diesel has virtually no sulphur content compared to fuel which was around in 1986.
- modern high performance and (semi)synthetic oils are very bad for old engines particularly low temperature direct cooled non-turbo ones but classic oils were intended for use with high fuel sulphur content .
- Adding Fuel Set helps disperse water to avoid the dreaded bug, but it is not clear if it adds any sulphur or equivalent compounds.
- It is still possible to find the obsolete CC and CD grade oils as specified in the original manual, but the chemistry is at loggerheads with modern fuel.
Bottom line is which is the right oil to put into the engine and gearbox of my aged engine to give it maximum life ?