Wow, I must be doing something right, because those epa numbers look seriously low compared to what I average.
I do mixed driving, but the bulk is in the city or on small highway trips (less than 2-4 miles on the highway). You could be seeing lower numbers beacuse you have an sl2, which has power everything and a sunroof. My sl is barebones and weighs nothing, so I think that helps.
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