I worked at a gas station, so I've seen a number of wonky things
a) someone leaves something under the hood, fire erupts b) piston ring wears out and when the spark plug ignites the gas, it also hits the fuel tank (I think more of the car would be gone) c) hole in the gas tank causes interior of car to fill with fumes (more common than you think). Anything from static electricity to the clock could ignite it. (One more reason to leave the windows down).
If the car wasn't on, it was more than likely intentionally set. Cars don't typically spontaneously combust.
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a) someone leaves something under the hood, fire erupts
b) piston ring wears out and when the spark plug ignites the gas, it also hits the fuel tank (I think more of the car would be gone)
c) hole in the gas tank causes interior of car to fill with fumes (more common than you think). Anything from static electricity to the clock could ignite it. (One more reason to leave the windows down).
If the car wasn't on, it was more than likely intentionally set. Cars don't typically spontaneously combust.