燃費は、いいですよ。参考までに、他社ですが。
http://www.mercuryjapan.co.jp/hottopics/past%20history/Opti%20115L%20vs%204st%20115ELPT%20XRi%2008-8/Opti%20115L%20VS%204st%20115%20XRI%2008.8.8.html
http://www.mercuryjapan.co.jp/hottopics/past%20history/Opti%20150%20vs%20150%20XRi/Opti%20150%20VS%20150%20XRI%2008.5.27.html