4.2 Quarts. But 4 will do just fine.
A 2003 Honda civic si needs five quarts of oil.
Per Honda Service Center in Torrance, CA 3.5 quarts.
4 quarts
3.4 quarts
4.7 quarts
3.8 quarts
3.5 quarts 3.5 quarts
4.6 Quarts of oil!
3 and 3/4 if filter is changed too
The exact oil capacity for a 1992-1995 Honda Civic DX/LX is 3.7 quarts.
Per Honda Service Center in Torrance, CA 3.5 quarts.