Hi Doug
Have watched your posts with intrest.
Many years ago I was involved with a number of power plants on Great Barrier Island.They all had Lister engines and never ceased to amaze at the high number of hours they clocked up.At the time mobile plant engines ie Cat IH were considered good if they achieved 10,000 hours before requiring a major overhaul,These Listers had many tens of thousand hours on them.In hindsight it was a case of very good engineering not requiring fancy lubricants to make up for design deficiencies.The common oils used at the time were 30wt series one diesel oils,ie Delvac 1130.
My biggest gripe at the time was the way the local Lister agents insisted these engines have the cylinder heads removed for a regular decoke,a practice I felt was unnecessary if the load factor on the engines was adequate.
As youve probably guessed I come from the Auckland region.