I Might Just Know What I'm Talking About
Join Date: Jul 2001
Location: Sisters, Oregon
Thanked 1 Time in 1 Post
In my experience, the 258 will deliver better torque. This might result in better economy, if you keep out of the go pedal. Economy is just a way of maximizing your dollar...in that case the cheapest and easiest would probably be best. If it came with a v-V6, stick with the V6. Likewise, if it came with a I6, stick with that. Year plays a part, too- V6 for pre 72, I6 for 72 and newer. The pre72 front was shorter, hence V6's stock, 72 and later were 4" longer and I6's were stock.
Real world experience?
94 Cherokee, 4.0L- 18 mpg without trying too hard, and has adequate power.
00 Wrangler, 2.5L 4 popper- 20 mpg, gutless.
Here's where it gets interesting....
70 Jeepster, 231 V6- 15 mpg higway if I drive 55 and accelerate like a little old lady. Not much power unless I'm high in the rpm's where mileage goes to crap. Keeping up with "the flow", accelerating normally, I get 12!
82 Scrambler, 350V8- 16 mpg driving normal, and enough reserve power to break stuff at will. That's with a carb and no overdrive. I'm building a FI setup/overdrive trans setup for this one.
I'm a firm believer that in real world driving, if you have more power than you really need, you'll get better economy than taking a smaller engine and working it hard to keep up.
It's not what you buy, It's what you build
82 Scrambler 5.3/4L60E/241OR/D44&HD20 4.56/lockers
1999 XJ Cherokee
1973 VW Bus
Last edited by Randyzzz; 10-20-2007 at 10:52 AM.