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[travman23]

My 2007 Monte Carlo SS has a 303HP V8 but it is a gas hog in town. Probably get about 17MPG in town on average. Can get mid to high 20's on the highway, depending on the terrain and how fast you are going. It has active fuel management which drops it into 4 cyclinder mode when it doesn't need all the added power but you need a flat stretch of highway and not going 80 MPH to keep it in 4 cyclinder mode for extended stretches to get the higher end of the fuel economy out of it.