The 0-40 Mobile One that meets the factory Chrysler specifications is no longer available in the US according to Mobil One. They do not have a recommendation for a replacement. They said to try a competitors oil. This makes no sense unless they want to avoid litigation if something goes wrong. My question is the Mobile One 0-40 European Car Formula that is available a viable substitute for our trucks. Mobile One would not answer that question. I would prefer to stay with the Mobile one brand.