Jeep intro

[DoctorP82]

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)

[Red]

Welcome to EM. Good to see another Jeep owner

[FastPlastic]

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

Originally Posted by DoctorP82

- using 5W-30 instead of 10w-30, or even a thinner synthetic brand

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.

[Red]

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

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

[markw365]

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.