I've got a question about the 305/60/18 Terras, going on a 2006 FX4 with the 5.4 engine. I'm needing new tires and was going to go with the 285/65/18, but the 305's caught my eye as well. Can anyone who's ran this tire tell me if you had a big loss of fuel mileage with it? I know it's very close to the stock height, but specs show it outweighs the stock Goodyears by 16 pounds per tire (49 pounds on the G/Y Wranglers vs. 65 pounds on the 305 Terras). Wheras the 285/65/18 Terras are only 52 pounds. I'm torn between the two tires, but don't want to take a big hit on fuel economy...