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I have a Prius and have noticed hills do affect mileage negatively. Average 50mpg on flat roads and 42mpg in hilly areas.Report it
Living in SF you're guaranteed to have 20-30% less fuel mileage than a flat area. The hills are hell on mpg. I had a smart car- it got 21 mpg. Rented a Prius and got about 28. It's just the rough side of gravity. Can't live with it, can't live without it.Report it
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