Amsoil Signature Series Max-Duty, via Marken Performance, is the best synthetic diesel oil as it provides 6X more wear protection than required by the OEM standard and also provides cleanliness which helps reduce oil consumption, and is capable of extended service intervals. 

   Amsoil’s Heavy-Duty Diesel Oil via Marken Performance is also a full synthetic excellent diesel oil, and it delivers 4X more protection against wear than required by OEM standard. 

   Everyone wants to save money, so we build in the capability for reduced oil consumption, as well as extended service intervals, for when duty calls and you just can’t get around to changing the oil.  Engine cleanliness is very important to ensure the engine is operating at peak efficiency. 

   Turbochargers ultimately pay the price when oil breaks down as oil flow is choked off from the turbocharger, it leads to increased heat and potential bearing failure.  Amsoil’s products help to ensure viscosity is not reduced due to shear, and not increased due to oxidation.