The 1 quart in 500 miles story is thirsty, but the real issue is having to check the oil. Waiting for the computer to initialize and god forbid if a door is open then its even more time before the oil gauge is accessible, if its ready. Meanwhile all that juice is draining from the battery. So there can be a failure for not checking and there could be a fail case where I drain the battery down trying to check the oil and it won't start.
I've been thinking about installing an AGM 60A charger in the engine bay that way it can maintain from the Lifepo4 pack and inverter. The ignition could take all day to boot then I wouldn't care lol.