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1955-1956 Packard Four Hundred

The 1955-1956 Packard Four Hundred offered smooth performance and up-to-date styling plus a bit of sportiness with its long wheelbase and two-door construction. Learn how the Four Hundred differed from the sedan that inspired it.

What speed should I drive to get maximum fuel efficiency?

I know that the faster I drive my car the more gas it uses. But on the other hand I'll get to my destination in less time. Is there a "sweet spot" on the speedometer that would give me maximum fuel efficiency? And if so is it different for different car models?

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