Thanks for the advice Tony.
I'm heading up to Sydney on Friday. So between now and then I'll see if I can get some spare filters and work out what tools I'll need to change them on the road.
If possible I'll fill up with BD for the trip back to Melbourne as I'd like to take the opportunity to clean out the fuel tank and lines quickly.

Does BD also clean out the diesel pump, injectors, etc ?

Does BD clean out combustion chambers, etc ?

On a vehicle with 380K kms on the clock, I want to concentrate on cleaning out the engine, including frequent oil changes, in order to adeqautely determine the condition of the engine and extend it's life if possible.

Peter.