Omg not a leaking central air unit those are the worst

You oil tank is full and you need a service?

By the stains in the area of the leak. If the vehicle had been leaking prior to service, then there will be dirty stains around the area. I there were no leaks prior to service then there will only be fresh fluid in the area.

The rear main is on the end of the crank shaft. The transmission and flywheel have to be removed to service.

leaky or leaking as in leaky faucet or leaking faucet.