Reply With QuoteI have been told by a couple of service mechanics that particularly when they are well run in you should go for synthetic oil for turbo diesels.
I have also found that on gravel - even corrugated but fairly flat stuff that a normal car could drive, the handling improves with the CDL locked. I think in the past I have bee too reluctant to use it and on a 4wd course I went on the teacher told us to lock it as soon as we went onto sand/gravel.
Good luck with your bus. They like regular servicing and will reward looking after.
cheers
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