The Amsoil Premium API CJ-4 Oils DEO 5W-40 & DME 15W-40 have been upgraded with a higher TBN level and and now recommends 3x the OEM recommended drain interval.
This is great news for those newer LMM, Dodge 2007+, and Ford 6.0/6.4 PSD owners. Not wanting to start an oil debate just want to...