Consumer Reports tips for making your gas tank go further
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You might not realize it, but your roof rack could really be hurting your mpg. “At highway speeds, more than 50 percent of the engine’s power is devoted to overcoming aerodynamic drag,” CR said. During a test with a Nissan Altima and Toyota $TM RAV4, he found that carrying two mountain bikes on a roof caused the Altima to lose 13 mpg and the RAV4 to lose 7 mpg.
