Clogged fuel filter or a leak in the fuel line. EFI fuel pump may be malfunctioning. Using a very poor grade of fuel can also affect performance and gas mileage. There are some brands of gasoline that I wouldn't put into my tank even if the gas was free of charge!
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The Honda Accord gets good gas mileage. The 2013 model gets 34mpg highway. Other Hondas, such as the Honda Civic, get better gas mileage but the Accord is a very fuel efficient car.
The gas mileage the hybrid Honda Accord will get on the highway is 45 mpg. The gas mileage in the city is 49 mpg and the combined gas mileage is 47 mpg.
The EPA mileage estimate for the 2005 Honda Accord is 23 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2014 Honda Accord is 24 mpg in the city, 34 mpg on the highway.
The EPA mileage estimate for the 2006 Honda Accord is 23 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2010 Honda Accord is 22 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2002 Honda Accord is 22 mpg in the city, 29 mpg on the highway.
The EPA mileage estimate for the 2004 Honda Accord is 23 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2007 Honda Accord is 23 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2011 Honda Accord is 23 mpg in the city, 33 mpg on the highway.
The EPA mileage estimate for the 2001 Honda Accord is 22 mpg in the city, 29 mpg on the highway.