poor fuel economy

2008 HONDA CIVIC

45,000 MILES • 4 CYL • FWD • MANUAL

GBEMIADIO

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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...

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Feb 13, 2012 at 10:04 AM

WRENCHTECH

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How many MPG do you get local and highway?

Feb 13, 2012 at 10:53 AM

GBEMIADIO

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16mpg local and 19mpg highway

Feb 13, 2012 at 2:35 PM

WRENCHTECH

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

Feb 13, 2012 at 4:55 PM

WRENCHTECH

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How about the exhaust system? Is that stock?

Feb 13, 2012 at 5:00 PM

GBEMIADIO

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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...

Feb 14, 2012 at 11:07 AM

WRENCHTECH

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

Feb 14, 2012 at 11:24 AM

GBEMIADIO

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Should i change the tires? if yes please recommend... what can i do about the exhaust?

Feb 14, 2012 at 11:55 AM

WRENCHTECH

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

Feb 14, 2012 at 11:59 AM

GBEMIADIO

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

Feb 14, 2012 at 12:05 PM

WRENCHTECH

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

Feb 14, 2012 at 12:08 PM