2003 Rubicon TJ with 140,789 miles (132,000 miles were with old original 4.0L I6 engine and 8,739 miles on the current 5.3L GM Vortec V8) - 5.3L GM Vortec V8 installed by Turnkey Engines in Dec 2012. The engine is a low mile 2004 GM iron block LS1 (LMG is the variant designated with the iron block) The engine swap also required a 1.5 inch body lift installed by Turnkey in Dec 2012. I have a heavy foot, but I average 13mpg in City and 15mpg on the highway. I have gotten 17mpg on the highway, but I had a strong tailwind without the AC on. -
