Oil leak seal

Because of the wide differences between servicing various oil leaks in various locations, an actual diagnosis must be performed, including a dye test, perhaps, where dye is added to the oil, and then a black light is used to determine what is "glowing" -- and that points out the source of the leak. Once you know where the leak originates from, an accurate estimate may be provided. I can't even ball-park the repair, because for example - a rear main crankshaft seal requires removal of the transmission to replace it, and an oil pan gasket often requires lifting the engine up.