this is now happened to me with less than 14000 miles. See my results in the general discussion site under accidental gas in Ecodiesel tank. after I started that site I found oil about 3 weeks later in the coolant. A full write-up is on that siteSad to say, but looks like I've joined the club. 2014 Bighorn ecodiesel with 45000kms when engine light came on. After saying it was likely a DEF issue they noticed oil in coolant. In a rental and not thrilled at what I'm reading. Planning a 2300km trip to Winnipeg to haul a boat to the coast. Better now than in Moose Jaw I suppose.