I worked in the automobile trade for many years. Years ago a colleague who operated a tow truck told me about this call he got for a Dodge Aries station wagon that a woman had just changed the oil and it would not start. Like most tow truck drivers he gave the car a quick check to see if it was something simple before towing it in to the shop.
The engine labored really , really hard when he turned the key. Then he noticed the case of oil in the back of the wagon with lots of empty bottles.
The woman had filled the engine right to the top with about 17 quarts of oil. It only should have took 4.5 quarts.
Towed the car in and drained out the excess oil and it was fine.