Simplest is that when you top up your oil you miss the filler hole a bit and the oil runs down to the lowest point.
Nastiest is if you have a crack in the head gasket and oil is being forced up the piston bores and through the crack.
If you take the plug out is it all fouled up with burned crud? Make sure the plugs are in to the recommended tightness...I have known oil seep into the combustion chamber then up the plug threads.
It can also be a worn valve cover gasket causing oil seep. On the KA24 engine there are 2 gaskets: around the outer rim of the valve cover and around the 4 spark plug holes.
0.044 is your spark plug gap.
Defective spark plug? Defective plug wire?
How do you change the spark plugs in a 1999 Nissan Altima. Can not get socket on the plug.
The correct spark plug gap is .044
0.44
0.043 inch
.044
.044 1993-1995
The Gap is .043
0.44 in.
A 1998 Altima may stall at 2500 rpm's over a bad spark plug or plug wires.
It may be that the spark plug is dirty. Try cleaning it