My SVXi sit way more than yours for sure.
Like a few weeks, if I go to start, they fire right up
with no hesitations and the fuel needles stay at about
the same positions as last time.
If that's your case, that's crazy!!
I never thought someone would do that.
Lot of american cars/some Japanese cars have no lock
fuel gap like us. You can just simply open without needing
any remote fuel release.
Let me us know if your gas mileage gets improved after you
purchased your key-locked fuel cap.
Try to park your
car at other spot like brighter or more people can look?