Savvy car buyers los angeles are accompanied by mechanics when purchasing used cars. The function of the mechanic is to verify that the car’s engine is functioning at optimum efficiency. The mechanic will check the engine and notify the buyer in case of any defects with the engine. The mechanic can also offer professional advice on whether or not certain engine problems can be fixed. Some problems can be fixed, however the repair will increase the price of purchasing the vehicle by a considerable margin. Thus the best thing to do is choose another car that is devoid of engine defects.