Originally Posted by jpit

Once when changing oil in a Mazda RX-7, I accidently drained out all the transmission fluid (instead of the engine oil) and added five quarts of oil to the engine (the two drain plugs were very close to each other). I didn’t check the dipstick because I was in a hurry, it always had taken five quarts and the engine hadn’t got any bigger. So for about ten miles I was driving the Mazda with no transmission fluid and ten quarts of oil. I couldn’t understand why billows of black smoke puffed out the exhaust. If I had been able to read these smoke signals I’m sure the car was telling me that I was pretty stupid.