I use a product called Rotella T here in the states.
Shell Rotella T 15W40 Motor Oil, 1 Gal - Walmart.com It is a 15w40 grade diesel motor oil, and the oil filter is a Napa 1064. Napa is an american auto parts supplier, however the size 1064 should be universal?
New Close Out Sale Napa Gold Oil Filter 1064 | eBay
In Australia Shell replied on a forum and said: 2nd Reply from Shell Australia:
For diesel engine performance Rimula X 15w-40 would be equivalent to Rotella T. However Rotella T in a universal oil, suitable for both spark and compression ignition engines, which Rimula X 15w-40 is not.
None of Shell Australia's high performance diesel oils (Rimula X 15w-40, Rimula Super, Rimula Ultra) are tested for spark ignition performance. As such we would not recommend using them in a motorcycle, regardless of whether they contain friction modifiers.
In Australia, Shell Rimula oils are used in heavy duty, 4 strokes diesel engine, while Shell Rotella oil are used in 2 stroke diesel engines. Therefore they are not comparable.
Rotella T is not a diesel engine oil, it is a universal engine oil and therefore will be suited to all types of engines. Shell Australia's high end diesel oils are diesel specific, and we strongly recommend that they are used for this purpose only.
regards
Shell TAC
Hope this helps a bit!