Another thing to keep in mind is that the EPA test assumes seal level driving. If you live in an area that is at higher altitude, the lower oxygen content of the air will adversely affect your milage. For example, cars here in Denver, CO (which is at 5,280 feet above sea level) never perform anywhere close to the EPA estimates.
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Here's the official explanation of the CU, not UC story: http://www.cubuffs.com/ViewArticle.dbml?DB_OEM_ID= 600&KEY=&ATCLID=24650
Another thing to keep in mind is that the EPA test assumes seal level driving. If you live in an area that is at higher altitude, the lower oxygen content of the air will adversely affect your milage. For example, cars here in Denver, CO (which is at 5,280 feet above sea level) never perform anywhere close to the EPA estimates.