1. Can Shell Rotella oils help to reduce the amount of ash in a diesel particulate filter (DPF)?

    Ash that is left as deposits on DPFs is produced when small amounts of engine oil are burned during combustion, this is called oil consumption and is a normal occurrence when non-combustible, inorganic material is carried through the exhaust. High quality engine oil like Shell Rotella® can help reduce oil consumption therefore reducing ash and improving DPF servicing intervals.

    Oil consumption that leads to higher ash can be caused by excessive ring and/or cylinder wear. All Shell Rotella® engine oils are formulated to provide excellent piston cleanliness, helping to minimize or keep the piston rings and piston lands free from deposits, which in turn helps control oil consumption. For ultimate protection, choose Shell Rotella T6 5W-40 that provides 75% better piston cleanliness vs. industry standard*.

  2. I was told that there was research and testing done that Shell Rotella T6 was proven to be the best oil for a motorcycle wet clutch system. Is there any truth to this?

    Yes, Shell Rotella® T6 5W-40 Heavy Duty Diesel Engine Oil and Shell Rotella T6 15W-40 Full Synthetic Heavy Duty Engine Oil meet the JASO DH-2, MA, and MA2 specification which is applicable for motorcycles with a wet clutch system. As always, please be sure to check your OEM and warranty requirements.

*Compared to CK-4 minimum levels