Range seems to be the new currency for efficiency, probably because it represents a less theoretical approach to how often you have to fuel up. Whereas mpg represents a broad idea of how far your ...

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A speed limiter or governor prevents your car from going over a set speed. How do these devices work, and what happens if you ...

Your driving habits have a big impact on fuel economy, but so do other factors, like friction and temperature. According to the Energy Department, cold weather can wreak havoc on vehicles in more ways ...