Most people don't have a clue about cars either. These are not the 80's, where most cars shared a common oil filter, used 10w-40 oil, and where very alike.
Nowdays the complexity of car has turned it into "magic", too. Choosing the wrong oil weight for a modern turbocharged car will wreck the turbo and the engine. Another example is the new style of oil filters. They are cartridge style with very delicate torque specs. an over torqued oil filter housing cover will create a significant drop in oil pressure due to to a leak.
Heck, even changing a tire is now a mess due to the recently implanted tire pressure systems.
Nowdays the complexity of car has turned it into "magic", too. Choosing the wrong oil weight for a modern turbocharged car will wreck the turbo and the engine. Another example is the new style of oil filters. They are cartridge style with very delicate torque specs. an over torqued oil filter housing cover will create a significant drop in oil pressure due to to a leak.
Heck, even changing a tire is now a mess due to the recently implanted tire pressure systems.