I would not get anything that would reduce your view if you are a new driver.
Though adding small fish eye mirrors to the corner of oem mirrors would help you spot cars in your blind spot.
Mirrors won't give you that big a boost. You may get 1 or 2 percent better however changing driving habits will give you 20%+. I would just focus on learning how to drive safely at first.
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Lifetime mpg
2012 mpg
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