I just took my father's 2010 Hyundai Accent hatchback in for an oil change after a long time between changes (8,000-10,000 kilometres). It was down more than three quarts. The mechanics told me that ...

My oil and coolant mixed together, the dealership is recommending an engine flush among other things. Do I need one? A car repair centre says no. Your thoughts? – Claudette Your question is sparse on ...