I agree, that 'no cap' fuel fill is the dumbest thing I've seen in a long time. What were they thinking??!!
I stole this from a Ford blog, the theory might apply to the Ram 2013's as well. Will do more searching after I get home.
I am not even remotely suggesting that I agree with such a device.
Snip.....
"Easy Fuel also has a patented mis-fueling inhibitor to reduce improper fueling and siphoning.
The inhibitor consists of a fuel nozzle detector that guides the nozzle to the opening. If a nozzle or foreign tube of a different size – a diesel nozzle or plastic hose, for example – is placed in the filler neck of a gasoline-powered vehicle, the latches will not release. For a diesel-powered vehicle, the inhibitor will keep out the smaller gasoline nozzles.
To protect the fuel filler neck from dirt, dust and debris, Easy Fuel relies on a flexible rubber seal in the body housing. The system also comes with a handy plastic funnel, which is stored with a vehicle’s tire changing kit, in case someone runs out of fuel and needs to add a gallon or two from a portable container.
“Because fuel cans are not standardized in terms of their nozzle, we needed to make sure customers could easily get fuel into the system if they ran out,” said Aitken. The funnel is the same diameter as an unleaded fuel pump nozzle for a gasoline-powered vehicle. "
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Mike.
