looking for a truck
 

Hello,
So i'm looking to buy a truck, I would like a diesel because of the better MPG and how long they last. I don't know much about ram but I did hear they made a V6 diesel. I would like to know if those trucks were reliable and just all around a good truck. This would be my first car so it would need to make it through the rest of highschool and college. I would be looking into a smaller truck like a ranger but being 6'6" I need something that I can fit in and there isn't slot of cars that I do. I don't want to pay for the gas of a V8 but I would still like to have the size. any suggestions?