POOR FUEL ECONOMY

  • Tiny
  • gbemiadio
  • 2008 Honda Civic
  • 4 CYL
  • FWD
  • manual
  • 45,000 miles

My 2008 Honda civic (i bought it brand new, ) fuel economy is so bad. I try my best to take all precautions to ensure the fuel economy is improved (using tips after 'googling') but its not helping. I already change the plugs and fuel line components. What can I do next. Please advice.

Love this site :-)

Do you
have the same problem?
Yes
No
Monday, February 13th, 2012 AT 10:04 AM

10 Replies

  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

How many MPG do you get local and highway?

Was this
answer
helpful?
Yes
No
Monday, February 13th, 2012 AT 10:53 AM
  • Tiny
  • gbemiadio
  • Member

16mpg local and 19mpg highway

Was this
answer
helpful?
Yes
No
Monday, February 13th, 2012 AT 2:35 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

That's pretty far out of line. Is the check engine light ever coming on?
Do you have stock tires and wheels?

Was this
answer
helpful?
Yes
No
Monday, February 13th, 2012 AT 4:55 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

How about the exhaust system? Is that stock?

Was this
answer
helpful?
Yes
No
Monday, February 13th, 2012 AT 5:00 PM
  • Tiny
  • gbemiadio
  • Member

The tires are not stock neither is the exhaust stock. The engine light is not on.I service it at 5000km interval consistently.
I have done all I know to do and I have not seen any improvement.

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 11:07 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

The aftermarket tires and exhaust are likely the cause. The tires will dramatically change the gear ratio and the exhaust will effect the backpressure.

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 11:24 AM
  • Tiny
  • gbemiadio
  • Member

Should I change the tires? If yes please recommend. What can I do about the exhaust?

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 11:55 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

The EPA fuel mileage estimates are assigned to the factory configuration of the vehicle. Aftermarket mods will always change that.

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 11:59 AM
  • Tiny
  • gbemiadio
  • Member

What kind of tires should I buy to replace the ones am using now?

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 12:05 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 20,039 posts

Everything should be exactly as the car came from the factory if fuel mileage is your priority.

Was this
answer
helpful?
Yes
No
Tuesday, February 14th, 2012 AT 12:08 PM

Please login or register to post a reply.

Similar Questions