1st gen troopers expedition rig fully loaded MPG

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1st gen troopers expedition rig fully loaded MPG

Postby CalenK » Tue May 09, 2017 10:04 pm

Hi everyone, did some searching but didn't really find exactly the info I was looking for. I want to know what kind of Gas milage people are getting in there fully loaded expedition ready 1st Gen troopers. I have a 89 2.6 4 door, 2" suspension lift, 31" tires, off road bumpers, roof rack, loaded with camp gear, one 20L jerry can and 20L of water, plus 4 passengers. with all that considered on a trip that consists of half highway and half off road, I get 260-280 out of a full tank. Is that normal? should I get more? what are other people getting with similar rigs?

thanks for any input!
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Re: 1st gen troopers expedition rig fully loaded MPG

Postby RickP » Tue May 09, 2017 11:06 pm

How many exact gallons you are putting in to those miles? Is you're speedometer accurate? With 30.50" inch tires, my speedo reads slow 9%, so I multiply my miles driven by 1.09 first and then divide by the gallons used . I would suspect 14-15 MPG would be what you could expect. I was consistently getting 15-16 unloaded and no roof rack and then about a month and a half ago, it has magically been getting 20.25 mpg the last several tanks.
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Re: 1st gen troopers expedition rig fully loaded MPG

Postby oldestisuzuist » Tue May 09, 2017 11:14 pm

Check the door pillar for stock tire size, if 235/75R-15s you're actually travelling about 7% farther than the odometer reading with the 31s. A loaded roof rack adds a lot of wind drag, couple that with the weight of the passengers & gear then your near 14mpg average seems fine to me.
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Re: 1st gen troopers expedition rig fully loaded MPG

Postby CalenK » Tue May 09, 2017 11:31 pm

The exact gallons going into those miles is 22 gallons( a full 89 trooper tank). I understand that all those extras add drag and weight, thats why I want to know what MPG other people are getting with similar setups. Most MPG calculations I can find are from people without those extras, driving stock troopers, that are not caring full loads of gear, extra gas, water, passengers... I also understand that tire size difference from stock effects the tripometer/spedometer/odometer. so really all I want to know is how many miles people are traveling in similar rigs on a full tank of gas.
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Re: 1st gen troopers expedition rig fully loaded MPG

Postby paulevans76 » Wed May 10, 2017 9:29 am

I wouldn't expect better than 15mpg on the highway when loaded down like that... throw in the off road and I think you are about normal.
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Re: 1st gen troopers expedition rig fully loaded MPG

Postby squatch » Wed May 10, 2017 10:19 am

A 2.6 Trooper on stock tires gets 17-20 mpg. One loaded down with 31's and stock gears gets 15-17 mpg.

Red Beans with 4:77's and 32's. Hot cam and exhaust gets 15+ loaded for bear and towing my boat.
These links have write-ups and pics of most anything you ever will do on a 2.6 Isuzu. Engine, brakes, suspension, interior, you name it! Enjoy!
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