Ram Cummins locking fuel cap
finally found a locking fuel cap for the Ram Cummins. http://bem-auto.com/blog/dust-on-the-ezloc/
Forum Discussion
The door has a soft rubber seal that does a good job of sealing the dust out. I'm thinking their test was done with the door open. I do think it's a good idea for sure. I use the Mopar cap that comes on the EcoDiesel trucks.
