So I've had a 91 ext cab 4x4 3.0 for bout a month now, and I've been slightly disappointed in its performance and economy probably because it's an auto. But today it proved its self. I had to use it to tow a 2001 4 door grand prix on a tow dolley 100miles, 200mile round trip. 65-70 the whole way and 17mpg. I was pleasantly surprised. Now it's not bone stock, isr mod, 2 1/4 exhaust with turbo muffler, no cat, by the front of the tire, no pair or egr, afm 2clicks lean and the air box bottom cut out. 4.56 gears on 31s.