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08 Sonata - Getting 15 MPG!?!

10-13-2011, 06:16 PM
Hi. I recently bought a CPO 2008 Hyundai Sonata GLS (4 cly). 60k miles.

The car is getting 15MPG! I dont know what to do. I took it to a dealership and they tried to screw me out of $400+ for a "spark plug, fuel injection, and air filter cleaning."

They did a full inspection and told me that nothing major was wrong. No leaks etc...

What is the problem? I live in LA and obviously am stuck in traffic alot... But how is my car getting such terrible mileage? I drive with the lightest foot ever.

If i change my spark plugs and put in fuel injection cleaner in my gas tank, will this really make a difference?

Please help! What do I need to do

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