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#1: 10-02-2013, 04:39 PM
Took my 2008 to the dealership for Spark plugs and Oil, now MPG has plummeted...
 
 ArmyMedic
Title: New Member
Location: CO Springs, CO
Car: 08 Legacy GT
Posts: 4
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Just bought a brand new 2008 Subaru Legacy GT, and was averaging about 27 MPG the first few weeks

I recently brought it in for an oil change, and I decided to have them change the sparkplugs (at 60k miles) since I heard it would improve my mileage.

Now I'm only averaging 20 mpg... could the dealership have screwed something up?
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