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My '99 Taurus 24V gets maybe 21-22mpg on the highway at 70mph. I keep the tire pressures at 36 psi and I run Mobil 1 5/30 synthetic oil. The car only has 50,000 miles on it and I keep it very well maintained. I can only conclude the horrible mileage is due to the mandated ethanol blended gasoline we have here in MN.
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