Check the belts.
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.
A new 2012 Honda Accord 4 cylinder gets 23 city 34 highway.
The 1990 Honda Accord with an automatic transmission gets an estimated 19 mpg in the city. The vehicle gets an estimated 22 mpg highway mileage.
My 1998 Accord V6 gets, 25mpg in city driving and 31mpg on the highway at 70mph.
The 1989 Honda Accord gets 21 miles per gallon in the city. It gets 27 miles per gallon on the highway. It has a combined rating of 23 miles per gallon.
The Honda Accord is a fairly fuel efficient car, especially for its size. It gets approximately 26 miles per gallon.
They are both great cars and there is no better. The Accord rides better, is quieter, and has more room. The Civic gets better mileage. Depends on your needs. Either car is a great choice.
I am not familiar with a multiplex, but if you are referring to the instrument cluster then yes the computer will store your mileage. If it is the speed sensor that is the problem then no.
You need to determine if it loses spark or fuel when it stops running. Once you have that info re-post the question with that info and include the year and engine of the Honda Accord.
My 1994 Honda Accord LX (4 cyl.) gets 29 mpg when driven on the highway at around 65 mph. If I push it to 75 or 80 mpg it drops to about 25 mpg.
Have someone show you as you are doing something wrong.
If you are asking about an Accord then expect 22 city & 30 highway