Both my Mustang and my F150 have that style of filler. I love not having to remove and replace a gas cap. I’ve never been worried about fuel theft but I don’t think it’s any easier with this new system.
My parents have a Taurus with just the flap in the filler neck. Unfortunately, they live two and a half miles from the nearest paved road. As anyone who has done much driving on dirt and gravel will attest, heavy dust quickly settles into every nook and crevice that isn’t tightly sealed. The cubby under the outer fuel filler door is not tightly sealed. So every fill-up involves a careful cleaning of the “flap” and surrounding area to minimize the possibility of dirt getting in with the fuel. But its almost impossible to clean it in such a way as to insure that none gets in. Dad makes sure to change the fuel filter once a year, and so far it hasn’t caused any other problems. But for them, this “convenience feature” is far less convenient than a tried and true screw cap would be.
Vehicles have been going to the capless system for the last 8years or so. It wasn’t as much convenience as it was EPA regulations to control emissions during fill ups, gas caps leaking or being left off entirely.
Weird, I didn’t even know that was a thing. My newest vehicle is a 1992, so I’m just excited to have power windows at this point.
So many of the gadgets and features on new vehicles make me say “why?”. Like motorized doors and liftgates. Is it really that hard to close a door with your hand? Remote entry and push button start… is it really that hard to turn a key? I actually like having a mechanical connection to my car. Cameras and lane departure warnings… maybe if new cars didn’t have such terrible visibility we wouldn’t need that stuff either!
Fords have had this for a number of years now. Can’t even put a fuel additive in without using special nozzle they supply. It would take considerable effort to siphon any fuel.