oil leak

RepairPal has an article on this that may help you a little bit: http://repairpal.com/car-fluid-leaks-what-to-do Is there oil on the ground after you have left it parked for awhile? If there is an oil leak, any competent garage should be able to find the source and repair it. Oil can certainly leak from any of the seals in your engine. My suggestion is to find a better garage and get some good help.