I'd be concerned that a pure fruit-based oil, like any other oil made purely from foodstuffs, would turn rancid over time, hence the refrigeration requirement. The petrochem-based Lemon Oils don't appear to have this problem.
FWIW, as stated previously by me in similar club post(s), my luthier uses a polymerizing tung oil that hardens. He's as anal as they come: after fret leveling and dressing, he scrapes the FB, oils it and then works the oil before it dries and hardens. He finishes by buffing the FB on a wheel! The resulting surface is non-oily, hard as a rock, and looks and feels incredible with a silky smooth glossy finish! It really has to be experienced to appreciate it. He claims that the FB needs to be sealed and finished...not just merely kept oily. He says that regular non-hardening oils just serve to saturate the wood and keep it soggy, harming (deadening) the tone. He's been an anal arch-top jazz box maker for 35 years or so, and he is a gifted child-prodigy jazz guitarist with an incredible ear, so I'll buy his argument for now, LOL! He is very picky and opinionated about tone, which is perfect for a picky PITA like me who shares those wonderful traits, LOL!
Gibson's Nashville Custom Shop Manager (Ernie King) was very impressed by my guy's work on my LP Elegant when it went in for warrantee issues. Obviously, Gibson doesn't go to the same lenghts when they ship 'em out of the factory, LOL!.