look underneath toward front ,theirs a 14 mm bolt screwed into the oil pan.
If your asking for what kind of oil it should be then its 20-50W, which you can find at any local motorcycle dealer.
13 to 14 cc??? are you serious?
The 2007 Nissan Sentra is 14 ft. 11.8 in. (179.8 in.) long.
The 2001 Nissan Sentra is 14 ft. 9.5 in. (177.5 in.) long.
The 2009 Nissan Xterra is 14 ft. 10.7 in. (178.7 in.) long.
The 2002 Nissan Xterra is 14 ft. 10 in. (178 in.) long.
The 2003 Nissan Xterra is 14 ft. 10 in. (178 in.) long.
The 2007 Nissan Xterra is 14 ft. 10.7 in. (178.7 in.) long.
The 2006 Nissan Sentra is 14 ft. 9.5 in. (177.5 in.) long.
The 2005 Nissan Xterra is 14 ft. 10.7 in. (178.7 in.) long.
The 2011 Nissan Sentra is 14 ft. 11.8 in. (179.8 in.) long.