Light comes on the dash of my mother-in-laws car. i look it up in the manual (this was before the systems that tell you exactly what is wrong) and tell my wife she just needs an oil change. my wife decides that is not it and that it needs water and then proceeds to fill the entire crank case with water (where the oil goes). when she tried to crank it, the car hydrolocked before starting. Well she did need an oil change after that. Over 3 of them. Luckily no long term damage to the vehicle. but cost me about $500.
i like to bring this up when she questions my car diagnosis lol
