Originally Posted by Nomad Willy
Shell Rotella and Chevron Delo is found in the majority of both diesel pleasureboats and workboats. If you want to buy a good brand name product here's your chance. And if I wanted to stray I'd go Valvoline.
Can't get Rotella in Australia and I am about to drop my oil and was about to get 60 litres of Valvoline.
Cummins guy who works on mine advised against it.
Said for mine, delo (caltex here) or castrol rx.
Observations from 20 years working on my model is that they guzzle and leak shell and valvoline product even though the specs are essentially the same.
Castrol rx is easy to get and pretty cheap so that's what it'll get.