08 Ram Engine Control Problem
 

A freind of mine borrowed my brand new Dodge Ram 2500... He put gas in it and used low sulfur and not "ultra low sulfur"... I checked with the dealership and they said it wont cause any harm.. So a week later im driving home and my MIL indicator comes on. And my heads up display has a warning that reads "Change Engine Oil"...

Does anyone have an idea of what this might be???

John