Warranty Service.

My 2012 Dodge Ram only has 15000 miles on it and I have my oil changed regularly. This time they said my truck has a problem. It is making more oil because the diesel in going into my oil in my motor! This is probably why I get such terrible mileage. My problem is that the only dealership is 70 miles away and the last time I went over for warranty work WITH SCHEDULED APPOINTMENT AFTER WORKING ALL NIGHT, my appointment was for 9:30 am and finally around 2:30 pm I went up and asked where my truck was and they said ,Oh they were just pulling it into the shop. Needless to say I was very unhappy and had to go back to work in less than 5 hours with no sleep so I had to have them just give me my keys and my truck without ever finding out why my CHECK ENGINE LIGHT KEEPS COMING ON. We have desiel shop here in Milton-Freewater, OR.97862, Whentlland Diesel. Can I take my warranty work there sincewe don't have any other but the one 70 miles away,Litha Dodge in Tri Cites, WA. I need my engine fixed right away.