i was told to come to this forum because you guys know your stuff. heres my question and please dont shoot me down for asking this i am truly curious. i am in a position to use mobil 2 jet turbine oil for free in my truck for oil changes. i know it sounds crazy but free is free haha. i have heard that they have new synthetic 5w oils for diesels and from what i can tell it quiets the noise of the diesel a bit. so i am unsure of how all the specs of oils read and mean. can anyone on here please enlighten me on this subject and not make me feel like an idiot asking such a question?....