Years ago, had a customer who i had just sold a range rover auto to, after 5 days, was back on the blower, shouting the odds about it was burning more oil that petrol ( and a V8 at that !! ) and that he was having to put a liter in every morning !!!
Now, this guy was a "expert" had Landrovers "before you were borne boy" type !!! So Van & trailer to go and recover the vehicle 60 miles away,
Got there and dip the oil, well overfull !!! ??? so got the "expert" to check, yep you guessed, idiot was dipping the auto box, Loaded onto the trailer , and brought back, must have taken a extra 5 + liters out the engine !! He did not have the bottle to collect, sent his wife, to pick up, along with the bill !!!