96 civic hatch
i got a D16Z6 motor in my 95 coupe and has a cracked rear main seal. wondering if this can affect any internal or external parts of the engine?. also i have been told that i just need to put in oil or check if the oil level is right so that i don't run out, and wouldn't be a big deal. if this is serious what are the costs for the seal and labor to fix it? and the car has no problems, no lights coming on/or off. and is this something i can drive on daily and normally?