I havnt driven my 2008 much yet, i live on an Air Force base and its very small. When my mom drove it down from PA to Texas she averaged like 19-20 mpg, all highway. Its a 4.0 auto extended cab 4x4 on stock, worn out 235-75-15r Goodyears. When i was back home for a few days, i think i got 17 combined highway and 4x4 crawling in snow(about 30 miles in it). As soon as you put bigger tires or lift it, your mpg will drop retarded low for a Ranger

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1995 f-150 4x4 4.9 inline 6 5-speed
1996 Ranger 3.0 2wd Auto 4r44
2008 Ranger 4.0 4x4 Auto 5r55 extended cab