To lose 1 liter to leakage means the leak must be very bad.
If not then you might have valve seal and/or piston oil ring problem which will burn off the oil.
With enough oil, the engine would run ok, but if it is burning oil, the plug would foul up much faster than they should. Engine power would not be 100 %.
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Monday, May 26th, 2008 AT 2:20 PM