Originally Posted by Yellowdude
I have a 91 yj 2.5 with 31" bfg all terrains and 4" lift. I only get about 12 mpg. And to boot my speedo reads 55 at 50. Soo it's prolly more like 11 mpg. I'm not sure why It could be so thirsty. That's around town and highway miles. What can I do to get better milage.? And what can I do to fix my speedo/odometer?
the speedometer is reading 55 and your only going 50?...a speedometer will only read higher than the speed your going if you downsized your tires from what the speedometer was calibrated for.....either the speedo gear is really messed up, the linkage is bad, or whatever you used to determin what speed you were going was wayy off...i averaged 16-18 mpg with 31" super swampers under my 2.5L 5speed....and my speedometer was off just the opposite of yours, the speedo said 50, i was going 55-56.(used both the gps on my phone, and my brothers new dodge journey to confirm)