Jeep intro
 

Hey all, a 1993 Cherokee owner here to introduce myself. Just recently found these forums and started reading up, and want to try to meet a fuel efficiency goal. Current EPA combined efficiency (from Fuel Economy) is 15 mpg for my auto 4.0L 6 cyl. I know that I can pull 16 - 18 mpg already just having been doing less aggressive driving already for some time. I'm hoping that with some more work I can try to push to 25 mpg combined or more!

Some things to do:
- Checked tire pressures, average around is about 33 psi (tire rated to 44 psi). Will inflate these to 40
- Removed window guards, those things that let you crack the window and not get rain in (caused lots of wind noise I realized, and probably decreased aerodynamics)
- Will remove roof rack
- Will block part of grill, and some areas around front
- Rear wheel skirts(?)
- Repair bumper: I have a big dent in it from a small bumper buster, probably the biggest killer currently

Some things I know I am curious about
- using 5W-30 instead of 10w-30, or even a thinner synthetic brand
- Acetone?
- I had the crazy idea for building a switch-deployable boattail, as well as a possible front mod to improve the curve over the hood out of clear plexi or lexan (would require some work definitely)

Welcome to EM. Good to see another Jeep owner

First off welcome. Seems more and more Jeep owners are interested in saving money at the pump.

I've been running 5W-30 in my Cherokee for a couple of years now. Haven't had any problems. Seems like after switching it starts better in the winter. One mechanic I talked to said there isn't a huge difference between them anyway.

Nah plus the 4.0 would lube fine on sludge............

So long as it vaguely resembles oil, the 4.0 doesn't care.

Most my jeeping buddies own Civic's or Integras, or Metros. We've found that's a much better way to get better economy from our jeeps. :) I filled my jeep about a month ago.
Mine's on 6" of lift with 33's and regeared axles. I get around 12-15 with it.

Be careful blocking off the grill, Cherokee's have a very limited cooling system, and you don't want to overheat it.