You're getting hit on all fronts. It's so bad that the EPA rates your highway mpg the same as a Dodge Viper. You may have one of the worst cars to drive for fuel economy because anything to increase it is directly against it's performance. Other than reducing weight I can't think of anything good for a performance car like that without taking away why you drive it. But there is one. Engine/trans heaters. A very small weight gain but you'll skip the harsh of the cold. In Toronto, I imagine it gets pretty cold.
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