Shell Australia has a PDF that shows what they claim are the cleaning benefits of their oils.
Notice the HX3 claims no cleaning abilities just helps to stop further deposits.
Sounds similar to Pennzoil in the USA.
The point is they do claim an ability to clean the engine for some of these oils not just keep sludge at bay.
http://s04.static-shell.com/content/dam/...mplete-2013.pdf
Notice the HX3 claims no cleaning abilities just helps to stop further deposits.
Sounds similar to Pennzoil in the USA.
The point is they do claim an ability to clean the engine for some of these oils not just keep sludge at bay.
http://s04.static-shell.com/content/dam/...mplete-2013.pdf