The car started immediately, idled and ran without stalling, and was driveable without doing any work to it. That means the battery was charged, the ignition points, distributor cap contacts, rotor button, coil terminal, ignition switch contacts, and spark plug wire terminals weren't corroded, the accelerator cable wasn't seized, the various moving parts in the carburetor weren't seized, the leather accelerator pump diaphragm in the carburetor hadn't rotted away, and the brakes worked. Those things are all at odds with your "accelerated deterioration" fan theory.
If a car goes through ~50 years' worth of outdoor abandonment-induced deterioration, whether natural or artificially accelerated, it absolutely will not simply start and drive. At the very least the battery will be dead as a door nail and the brakes will be seized. Additionally, the starter (and/or its relay/solenoid), alternator, carburetor, and accelerator cable will probably be seized as well, the piston rings will probably be stuck to the cylinder walls, and the ignition system will be full of corrosion.
"Its a story about a possessed car, so its not necessary following logic."
I didn't say anything about the logic of the story (though all stories have to follow their own internal logic, else you get plot holes), I said that your fan theory doesn't logically follow from anything presented in the movie. You might as well assert that Christine can fly. That assertion wouldn't logically follow from anything in the movie either, therefore it would be a baseless assertion.
She had some powers left to keep her operational...
Again, you're simply making stuff up, stuff which is in no way supported by anything in the movie. Take away Christine's powers and it's just a regular car, and cars (and anything else) deteriorate at a normal rate, which is determined by the conditions of its environment.
Dude, the car and it's powers are fictional. The deterioration is just what happened. Feel free to think up a reason.
"Dude, the car and it's powers are fictional."
Thank you, Captain Obvious.
"The deterioration is just what happened. Feel free to think up a reason."
I already know the reason, i.e., the prop department overdid the weathering/aging effects on the car.
So you're just trolling. Ok.
Your laughable attempt to redefine the word "trolling" is dismissed.