Both are amazing going off of what I know about them.
So far, where the Ram's EcoDiesel shines is in fuel economy, it gets a while 6MPG's more than the F150 Diesel. I believe towing is also better.
So far, where the Ram's EcoDiesel shines is in fuel economy, it gets a while 6MPG's more than the F150 Diesel. I believe towing is also better.