Fuel Millage

[Andrey]

Ok I read few posts about some people getting 20-22 mpg and i only get 13-14 on my 98 trooper with 110,000 automatic. What am I doing wrong? I am afraid to turn my da$$ A/C on cause it just blows money right out of my pocket. What can i do to increase my millage.

[amigo-2k]

tire presure
alignment
fuel filter
pcv
egr
clean the injectors.
run synthetic oils (in the diffy, tranny and motor)

[Andrey]

Got everything except EGR. Would it make that much difference?

[rodeo02]

I think 20-22mpg is stretching it a bit. You can't get that with a smaller ligher rodeo! Now that I primarily drive our rodeo, I get 20-21mpg's just by going easy on the go pedal. I *Had* a tendancy to drive it hard before gas hit $3/gal+, taking off slow & easy and keeping max speed under 65mpg helped A LOT for me. Another important MPG factor is tires. Keep them aired up!
G/luck
Joel

[89trooper]

Air filter, spark plugs, plug wires good? If thats not it, try a new oxygen sensor next. I have more stuff in mind but they are more expensive. I have a feeling you are doing good maintenance so your AF, SP and wires are good. Autozone sells a cheaper universal O2 sensor that could make a big difference.

[94trooperman]

maybe sping for a k&n air filter and dont gun the motor as much =) i get like 12-13 mpg, but that is all city miles and i drive the hell out of my car. 191,500 miles and counting.

[99trooper01]

Originally Posted by 94trooperman

maybe sping for a k&n air filter and dont gun the motor as much =) i get like 12-13 mpg, but that is all city miles and i drive the hell out of my car. 191,500 miles and counting.

A couple of things not mentioned are:

Install a vortex generator in the air intake hose - 1 mpg
install a 750 ohm resister in series with the intake air sensor -1 mpg
install 265 70R 16 tires - 0.5 mpg

drive 60 mph instead of 75 mph - 1 mpg

The BEST mpg i've gotten in my 99' Trooper is 19 mpg at 72 mph
The BEST mpg i've gotten in my 01' Trooper is 21 mpg at 72 mph

I doubt anyone is getting 22 - 25 mpg in a Trooper anywhere anytime!!

[metomwhou]

99trooper01,
Are you using OEM plugs? If not, which ones are you using, I have a 99 Trooper too.
Thanks,
Tom

[SteveOlson]

Greetings!

I have a '90 Trooper, 2.8 V6, 5sp manual. I consistently get 20 to 23 mpg. If I *really* work at it, I can get 25. How do I do it?

1. Accelerate SLOWLY. Get a vacuum gauge sometime and watch it when you're driving. It makes a big difference.

2. Drive SLOWLY. Yep, I'm the putz in the right-hand lane going 50 - 55 when everyone else is blowing by me @ 70 - 80 mph. I wear those big wraparound sunglasses so everyone thinks I'm old.

3. Good tune-up. I use old-school Champion plugs and they work fine. Clean air filter, pcv valve, EGR valve. I used an entire can of carburetor cleaner when I first purchased the Trooper about 6 months ago, you should have seen all the stuff coming out of the tailpipe!! *Warning* have the engine running at a pretty high idle, don't spray it with the engine off. I hydro-locked my Geo by not running the motor.

4. Did I mention driving slowly?

5. Make sure your hubs are unlocked.

6. Make sure your wheel bearings are well-greased and adjusted properly.

7. Make sure your brakes are functioning correctly. I had a caliper sticking and that dragged one brake so bad it chewed through the rotor.

8. Grease all your fittings, including the driveshaft.

Hope this helps!

Steve Olson

[mrmax13]

I have a '94 Trooper (standard, 4wd) that had 16 miles on it when I bought it from the dealer. Back in '94, it got 20 mpg highway, about 15-17 city, and about minus 5mpg all around for heavy a/c use.

It still get the same exact mileage 188,000 miles later and I have barely even done the regular maintenance.

I don't drive like an old lady, but take it easy on the fast acceleration. If your tach is hitting over 4k before you shift, think about what you are doing.

I suffer through with no AC as much as I can but live in SoCal now (bought the Troop growing up in NH) and it topped out at 113 last week.

Just ease on the gas and you should see a great difference.

[Ramblin Fever]

Still think a 5-spd will naturally get better mpg then an automatic, it's going to be harder, if not impossible, for an auto to get the same mpg as the 5spd.

But all the same ideas still abide, taking off easy is a big thing.

I occasionally, like twice in a year, try to keep nose to nose with the guy (in a similar sized vehicle) in the next lane as the light turns green - when I do this, in my automatic Rodeo, I can easily hit 4-4500 rpm's. Whereas when I take off normally, I barely hit 2500 rpm's, that's some fuel savings as well as wear/tear savings right there.