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F-250 Member
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42 Posts
Discussion Starter #1
does anyone know what a 89 ford bronco 4x4 with the 302 gets for overall gas mileage because mine sucks plus i want more horse power but dont know how to get it
 

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Mark VII Member
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47 Posts
Do you have lock out hubs? If so I would think that you are getting around 17 on the highway or better. Depends on what type of driving you do.
 

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Mark VII Member
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47 Posts
Yes, I meant the manual ones. To help with gas milage keep the thing tuned up, try to free up some flow through the intake and exhaust ( this will help with H.P. too), and consider running not so large tires. By that I mean that those big monster swamp tires may look nice but they suck a lot of gas and H.P. Your milage will never be great because you are trying to push a big, square, heavy box down the road.
 
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I have the 302 in my 95 bronco. I get about 13 miles on the highway and 11 in town, i have the auto hubs, so i would imagine you should be getting better that 15 or at least close to that.

T
 

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Mark VII Member
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47 Posts
Thats worse than I thought. I don't own one and I was just gessing. We have a 86 F250 4x4 on the farm with a 300 I6 that gets around 17. I thought maybe a Bronco being lighter would do better. Too much weight and wind resestance I guess.
 

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F-250 Member
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42 Posts
Discussion Starter #7
cool replys but i figured i have a 32 gallon tank that gets about 280 to 290 miles outa it but does a broken motor mount make it get less gas milage and i jus got a snorkle hood scoop to ram air down in my motor bu tto get it set up is gonna be hard cause i want more horse power at cheap u know what i mean but im lookin around to see how to glass it in and make a air pan and route the air houses through it and bein the truck is efi u know so this will be hard and fun at the same time to so if anyone knows how to do this or already has please let me no oh and i do have 31's on it right now but i want 33's with a 3in body lift
 

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Mark VII Member
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47 Posts
As I said I don't own a Bronco. Still, are you sure you have a 32 Gallon tank? That sounds kinda big to me. The only sure way to figure gas milage is to fill up at the same station each time. Stop putting in gas when the nozzel shuts off. Write down your milage and the amount of gas used. Than do this several times ( at least 3) and get a avarage. I always keep a little note book in the glove box and keep track of all the gallons I use. That way If milage drops suddenly I know I have a problem. This will also help you to develope driving habits that will help out. You will also begin to see paterns developing due to weather , modifacations you make, and other things. It sounds hard but, is easy to do. It took longer to type this out than the amount of work it takes. It would be good for you to do this now and get a baseline so that you have something to compair future changes to.
 

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F-250 Member
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42 Posts
Discussion Starter #9
thats cool yeah its a 32 gallon tank cause thats the # it said at the pump but what im doin is fillin all the way up then runnin it dry this is my 3rd time
 

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Bronco Member
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69 Posts
32 gallon tank

That sounds about right....it seems like I read somewhere that the full capacity was about 35 gallons or so!

Takes forever to fill up! :)
 

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F-250 Member
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42 Posts
Discussion Starter #11
does anyone know this ........ i drive my 89 bronco down the road at 30 to 35 miles per hour and it shakes abut when i hit the gas and make the truck go alittle faster it seems to stop does anyone know why this is could it be the u joints
 
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I have a 92 Bronco, 302 with 3:55 diffs and 31 x 10.5 tires. When I bought it last Spring, I was geeting 12.5 MPG City and 14 MPG City/Hwy. I added a K&N FIPK and the Jacobs Mileage Master ignition. I now get 15.75 combined City/Hwy and 18.5 Hwy. I also have a lot better low end torque. Next Spring I'm going to install the Flowmaster cat-back exhaust.

You actually might be getting better economy than you think. Has your speedo been re-calibrated for your larger diameter tires?
Mine has not, so I add 6% to both my mileage and my indicated MPH.

Here is a site that has a calculator to help you figure it out.

http://www.4lo.com/
 

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F-250 Member
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42 Posts
Discussion Starter #13
31x10.50x 15's are stock for my bronc and it still shakes around 30mph and jerks when it shifts over a gear and yes it is a auto and now i have to go to michigan to pick up a 76 f 250 4x4 that i got off ebay and i have to tow it with my bronco
 

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Bronco Member
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69 Posts
speedo recalc

hmm...good point..my Bronco didn't come with 31x10.5's originally. how did you come up with the 6% figure?

thanks,
reg
 

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Ranger Member
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16 Posts
My '86 gets about 11 mpg around town. I would like it to be better, but the '95 in the above post gets the same so apparently it's the nature of the beast.

Anyone now what the tow rating is for a '86 with a 302?
 
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