If you leave an IC car for a long period of time with 1/2 a tank of gas you can destroy the engine. Gas like everything else breaks down and if you left leave your car sitting for a long time you may need to completely drain the gas tank.
PS: Gas can noticeably degrade in as little as one month depending on ambient conditions. But, condensation is the largest risk for mid term storage. After 1 year you will probably have trouble starting the engine even after replacing the battery. And 3-7 years your probably looking at major repair work.
All very true; but I don't think very many IC engines have died just because the owner took a longer than expected trip and came back to the airport to find their vehicle's engine is destroyed. Furthermore, the costs of any such IC repair wouldn't be nearly as high as what it is in the Tesla.
The point is simply that Tesla should give more warning and attention to the very high cost of repair when you forget to plug the vehicle in or leave it unattended for long periods of time.
I've done this plenty of times. It's a common risk in cold climates when tractors, cars and lawnmowers are parked outside and one forgets to drain the tank. It gums up the carburetor. So you rebuild the carburetor, which takes 1 hr and $5 to do at home, or $100 at the dealer. Not $40,000. It also doesn't "destroy the engine". There is a high probability either don't know what you are talking about and made that claim up, or you are intentionally being misleading in order to promote a viewpoint using false claims.
First off most cars build after the 1980's don't have a carburetor and generally use fuel injection. Also, to much water in the tank can easily lead to a blown head gasket among other things.
Second most cars don't cost 40k, but if your talking about a say a bugatti veyron it's not that hard to do 40k of damage. If you want to compare it to the cost of the car then for an older car having a few thousand dollar repair bill can easily cost more than the car is worth.
PS: Gas can noticeably degrade in as little as one month depending on ambient conditions. But, condensation is the largest risk for mid term storage. After 1 year you will probably have trouble starting the engine even after replacing the battery. And 3-7 years your probably looking at major repair work.