Porsche CARRERA GT-2004 Manual page 70

Display "Check oil level"
The computer display "Check oil level" is an addi-
tional reminder to you to check the oil level.
The display depends on the distance travelled and
the operating conditions, and does not indicate
whether or not the oil level is correct.
70
Controls, Instruments
"BC"
Calling and resetting on-board
computer functions
Switching on selection field "A"
f Push operating lever forward.
Example:
Resetting average consumption
f Select "BC" with the operating lever.
f Push operating lever forward.
f Select "∅ mpg" with the operating lever.
f Push operating lever forward.
f Push operating lever forward.
The average consumption is reset to
"– –.– ∅ mpg".