2005 Accord - Sudden significant decline in miles/gal
 

Greetings,

My 2005 Accord EX (2.4L) did average of 28 miles per gallon for two years (since I got it in November 2004 until about begining of December 2006). I drive the same highway every day, same speeds (average of 75), same distance every day, went through the same seasons twice (summer/winter) in the same place. Nothing, and I mean absolutely nothing has changed in my driving habbits.

Then, sometime in begining of December 2006, all of a sudden I noticed a decline of about 20% in my fuel consumption...from average 28 to average 22.

Any one experienced this before? Any idea what could it be?

Thanks.