Was in a hurry on the highway the other day, and was riding around 85-90 (didnt seem like I was ) and just for ha-has I check the computer and I was reading 21mpg, I was pretty shocked, but I'm also a stock 4.0L except custom intake, and short straight pipe off cat, and it was steady, no traffic or slowing down/speeding up either. Normally I look at ~15/19 city/highway.
'98 ZJ Laredo, 4.0L, 140K, NP242, stock. (Sold @205k)
'99 WJ Laredo, 4.7L, 175K, NP249, stock. (Sold @240k)
'97 ZJ Limited, 4.0L, 109K, NP249, stock.(Current)