2011
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2011 Civic Si Coupe Specifications
EPA Mileage Estimates[1] / Fuel
  Si
6-Speed Manual (City/Highway/Combined) 21 / 29 / 24
Crankcase (qt) 5.8
Coolant System (qt, MT/AT) 6.7
Fuel (gal) 13.2
Required Fuel Premium Unleaded
 
[1]  Based on 2011 EPA mileage estimates. Use for comparison purposes only. Do not compare to models before 2008. Your actual mileage will vary depending on how you drive and maintain your vehicle.