Gas Mileage in your Blazer?

Hi all,
 
 Just wondering what everyone gets for gas mileage in their Blazers. I have a 98 LT with a 3:42 rear end. Maybe just need a tune up, but getting about 14 in the city and 17-18 on the highway. Anyone getting 20+ on the highway, and at highway speeds, like 70 mph.

I don't know if any blazer with a stock drivetrain will achieve 20+ at 70+ MPH, but mine typically gets 20 MPG average with mostly 55-60 mph driving.  Here recently it has droped to 19.1 mpg (it's very cold here the last few weeks).  It has a 3.73:1 gear ratio, but has the tallest of the available tires (235/75/15).  I also always run the same fuel and use ONLY G.M. tune-up parts.  By-the way, the ORIGINAL plugs,wires,cap and rotor were removed and replaced with 101,000 miles on them and it got about 17 mpg when I changed them. 

We get about 14.? now according to the inconsistantly consistant lieing trip/overhead computer. 
It was around 16.3 mpg ave. over the summer. (the average of about 12 tanks I hand calculated.)
 
I have 3.42:1 w/ 235/75R15 @ 35 psi. 

I've been running a lot in 4 wheel (gotta love global warming eh?) but I've been getting about 15 mpg taken across 4 full tanks since I put in a CAI.

i get 16-17 jus bout every tank i got a 97 4x4 5spd. with 255/70 and that with figurein the taller tires 

This topic comes and goes, but I digress...

My Bravada is probably the worst case of all...  AWD, 3.73 gears, & 235/70R15 tires.  I have been getting around 15-16mpg with the measily driving I do for work now (less than 6 miles to work).  I dipped down to 13mpg for a tank full but that was primarily due to 3 fire calls during that week and 2-5*F weather.  My best was ~20mpg when I moved and that was mostly interstate with the truck loaded right down.  But we were only driving around 65mph as my father-in-law was driving the U-Haul truck and we sorta caravaned it across NY state.

Wow I am getting like 11-12 mpg. All of it stop and go driving no highway. Last tank i drove 155 miles and put 13 gallons in. It is cold here but it was the same during the summer as well. Its mostly my driving style but even when I drive slowly I dont even notice much of a different maybe 1 to 2 mpg. 

When was the last time you did a tune up?. Cap,rotor, plug wires and plugs?. I pity you guys with 4 by 4's, my Tblazer gets 15 in the winter (in 2 wd) and not much better in the warmer weather. I'll run it to Florida and back in May and I'l hoping for 17-18.
 
My 2 wheel drive 2 door Blazers have gotten 18 mixed and 22-24 highway. And I KNOW what it gets!. All of us with shot fuel level gages drive by the odometer. Fill the tank, zero the odometer.

I just did a highway trip, and I got 24 MPG, varying between 75 - 80MPH
 
I've got 3.42 gears and 235/75R15's
 
Temperature varying from -4*f to 5*f

quote:

When was the last time you did a tune up?. Cap,rotor, plug wires and plugs?. I pity you guys with 4 by 4's, my Tblazer gets 15 in the winter (in 2 wd) and not much better in the warmer weather. I'll run it to Florida and back in May and I'l hoping for 17-18.

My 2 wheel drive 2 door Blazers have gotten 18 mixed and 22-24 highway. And I KNOW what it gets!. All of us with shot fuel level gages drive by the odometer. Fill the tank, zero the odometer.

 
 
I guess it didn't snow on Gilligans Isle this year. My driveway accumulates snow drifts quite a bit. Everytime it snows

So does mine, which is why I have a 4 wd 2006 Trail Blazer.
 
24 mpg with a 4x4 at 70 mph. OK.

Makes me want to change my 74 into my daily driver. I get 30 mpg w/ that. Have not really set my MPG on my blazer due to still working out all the gremlins.

Since I bought it (December) Ive almost always gotten 14.  A few times Ive gotten as high as 17.  Its been pretty cold here lately and we have been getting about 4-8 inches of snow a week lately so Ive had to scrape the windshield and just let it idle while I do it.  Ive also been useing 4wd a lot lately since my tires suck in snow.
 
I have changed the air filter and it was pretty dirty so that should help a little bit.  I will replace plugs and wires when it gets nicer out since I dont have a garage to work in. 

I get 12mpg around town and 14-15 on the highway.

I havent put a cap and rotor on but I have replaced my wires and plugs. I replaced the fuel injectors when i bought it in 04.

I get a steady 18.2 mpg, at a 75 mph average speed.

Hhahaa you got owned by a 1974!!!!  30mpg

My 4.3i Blazer consumes 15 Litres per 100km, stock equipment. 75mph average speed.

1 gallon = 3.79 lites = 3.79 EUR = $ 5,05
100km = 62.137 miles = 15 EUR = $ 20,0

=> 16 mpg

that seems okay.

92 - 4.3 4WD gets 17-18
 
88 blazer has a LS1 auto and 4.10 gear with Lock up convertor and OD gets 23 mpg
 
carbed 355 in the limo S10 truck T400 3.23 rear gears gets 16 by itsself .... but usually 9-10 since its usually connected to the camper or the car trailer.
 
http://www.blazinlow.com/forum/attachment.php?s=&postid=571210
 
 
 
my other S-series vehicle gets gallons per mile when playing ..... but it is fun.
 

I have a 1999 Blazer with 118K miles and new tires. I just made a run from laramie Wyoming to Denver and halfway back to Laramie. All speeds were consistently over 65, with 120 miles of the trip at speeds varying from 65-80 MPH. I had a small set of ski racks mounted on the top rack. Gas mileage carefully calculated from fill-up to fill-up: 20.2 MPG.

Incidentally, this Blazer still has the original plugs, wires, cap and rotor.

That felt good!

its bad to mix different fuel grades?

Won't hurt anything...

When you buy gas at Esso, if you choose the mid-grade, it's just regular and premium mixed together