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Gas Milage Reports

02-09-2004, 09:11 AM
Alright, it's time for the ultimate question: What is your Blazer's gas milage like? If you don't know city/highway, just do the average (miles/tanksize). Also list your engine/year/miles. This could be quite interesting and helpful or just plain embarassing.

02-09-2004, 12:26 PM
1993 GMC Jimmy 4.3 Wseries...
new CPI Unit and internal fuel lines...17-19MPG

Glenn Peters
02-09-2004, 06:37 PM
1998 Chevy Blazer 4.3L City 13 to 15 Highway 17 to 19. Tell me that doesn't suck. Going to Vermont in 3 weeks, will post mileage results when I get back.

02-10-2004, 07:53 AM
'97 Chevy Blazer 4.3L 160,000. Don't use much city miles. Mostly highway. Get about 19 mpg.

02-10-2004, 12:35 PM
I forgot to include my own.
99, 4.3L, 68,000, avg. around 19. But not lately because of the cold.

02-11-2004, 12:50 PM
1985 2.8 15 city 24 hiway , 14 gal tank, also i keep my speed down to 60-65 rang

02-11-2004, 07:31 PM
1988 5.7L automatic 350 4x4

in 4high I get about 2 mpg
in 4low I get about .5 mpg
in 2high I get about 9-10 mpg
in 2high on the highway about 12-13 mpg

3inch lift, 33inch tires, holley carb, K&N Airfilter

I use about a tank a week I'd say ... to fill my tank with normal unleaded is 44$ or so here in DFW.

02-11-2004, 08:09 PM
1993 vortec s-10 blazer 220,000 miles
19 gallon gas tank
19-21 mpg highway
15-17 mpg city
everthing is stock, regular tune ups and maintenance.
also carrying 100 pounds of tools and a box with 2 12's in it.
My truck does pretty well for how many miles it has on it.

02-24-2004, 03:28 PM
1996 S-series Blazer
4.3L CPI V-6 stock
city driving about 12-14
averaging 200 miles per tank

Other then that, shitty gas milage in general.

Milwaukee, WI

30 pak
02-24-2004, 08:22 PM
1996-LT book says i have a16 gal tank but I have put 17.5 in. but anyway avg. 300 miles to tank 14to 19 avg per mile.

02-25-2004, 01:00 AM
1998- 4.3, 80,000, 18 gallon tank, mostly interstate driving doing 75 mph, averaging between 18 and 19 mpg. During the the colder weather and some 4hi driving I was averaging about 14.

02-25-2004, 12:13 PM
Whats the formula for calculating your mileage?

02-25-2004, 01:57 PM
1) Fill up your tank
2) Reset Trip Meter
3) Drive for however long you want
4) Go back to the gas station and fill up, again.
5) Write down how many gallons you put in (ex. 9 gal.)
6) Take your trip meter miles and divide that by how many gallons you put in. That's the average mpg you get.

02-26-2004, 01:41 PM
Milage varies 12 to 24...
If you are getting...bad...gas milage...
200 per tank...something is wrong...
i.e. leaky internal fuel lines...
leaky fuel pressure regulator

Glenn Peters
02-29-2004, 07:40 PM
Just back from vermont 17.5 up and 18.2 back, 98 blazed 4.3

03-06-2004, 08:53 AM
We have 99 4-door LS 4.3 Automatic that gets 18 city and 22 on the highway. 56,500 miles. I replace my air filter every six months and oil and oil filter every 3000 miles. I think the air filter is important for fuel milage.

03-06-2004, 09:28 AM
When I ha dmy 2001 Blazer with the 4.3 I would average about 21 combined in the summer, but would drop to about 17 when it got cold out. Pure highway was 23-24 mph from Michigan to Kansas during the summer.

I was running a K&N filter and a 3" drop on a 2wd. I noticed about 2 mpg gain after the drop.

03-08-2004, 02:13 PM
78 blazer
6-8 city
maybe 10 highway(downhill)
v-8 with nearly 200,000 miles
35" tires, k&n,

03-10-2004, 07:52 PM
I am going to replace the fuel filter and do a tune up on it as soon as it warms up a little.

How do you check for interal leaky fuel lines and pressure regulator?


03-12-2004, 10:22 AM
by looking inside the upper intake (plenium)
Do a search on leaky fuel lines ... CPI unit...
you will find lots as this is a common problem...

04-01-2004, 01:22 PM
:smokin: Well '97 Blazer 4x4 4.3l 128k before changing belt, fuel filter, cap, rotor, plugs, wires, all o2 sensors, k&n air filter, and oil i got 10mpg all over. now i get like 17mpg. was it worth the $400 some bux... Hell no. Of course it might have somthing to do with the fact i do 90 all the way to work and back down the highway every day.... 52 mile round trip. :banghead: It looks nice but man $10 a day in gas sucks. This truck is a POS. Anyone want it? Kalamazoo/Battle creek Michigan area. Ill sell it to ya. :lol2: Anyone have any suggestions on how to get better mileage out of this beast? thanks

04-01-2004, 02:36 PM
2001 4-door LT, 50k miles 4.3L Vortec
K&N Air Filter, Flowmaster Series 80 Exhaust, Bottle of Gumout fuel system treatment every 7500 miles, (about 3 bucks) 21 city-25 highway, and i drive fairly hard.

04-01-2004, 03:39 PM
2001 4-door LT, 50k miles 4.3L Vortec
K&N Air Filter, Flowmaster Series 80 Exhaust, Bottle of Gumout fuel system treatment every 7500 miles, (about 3 bucks) 21 city-25 highway, and i drive fairly hard.

Hey man, when u got the new exhaust, did you replace the cat converter also? Maybe that would entale a gas milage increase also?? Not sure about the performance exhaust tho, seems like that would give you worse... lol :evillol:

Glenn Peters
04-02-2004, 06:43 PM
The blazer, at least my 98 is rated at 16 city and 20 highway. Thats about what I get.

04-03-2004, 09:12 AM
I drive a 99 S-10 Blazer. I am getting 17-18 city driving and 21-23 highway driving. This is what im doing,Im using Mobile 1 Synthetic oil and put in a K-N air filter. A sure fire to save gas is,easy on the pedal. Like coasting to redlights (time out your redlights so that you go throu on green without stopping) easy on the pedal when stopped at redlights and stop signs,no mashing the pedal when taking off.I get best millage on the interstate at 65mph with my blazer, when you increase your speed over that, you start to lose your mpg,s running at 70 mph, i lose around 2 mpg. now think about it. you only gain 5 miles every hour when driving 70 mph. yea, 65 sucks but it does save some fuel.

04-05-2004, 02:02 PM
96 4.3l, mainly do city driving averaging 13-14 mpg.

04-06-2004, 09:56 PM
2001 GMC Jimmy 4.3L. 78,800km. Hiway...7L/100km. City...15L/100km.
Average about 13.5L/100km. You do the math.
Canadian Eh!

04-06-2004, 10:05 PM
:wtf: lol way to confuse a michigander.... haha. okay here is one for you i now get 300 miles to 17 gallons. exception is my tires are 245/60-15. so speedo says im going 65mph and im really going 60mph. hehe, can u figure out how many true mpg that is? :grinno:

04-09-2004, 04:41 PM
The difference in actual miles is 7.69%, that means you really travel 277 miles on your 17 gallons, equalling 17mpg. (US gallon)

04-10-2004, 11:32 AM
new highway milage on my 4.3L Wseries...
20-21...I am pleased with this

another good reason to replace the intake CPI unit and internal intake fuel lines...

04-04-2008, 06:10 AM
96 4.3L 26xxxxmiles. I just ran out of gas after a fill up. At 293mi but i dont know how big the tank is. i do mostly freeway to work 34mi. a day 5 days a week, and the rest city. how big is the tank on a 96 4x4 blazer 2 door?

04-04-2008, 05:26 PM
Welcome to the site. The tank on a 96+ 2 door blazer/jimmy is 19 gallons. This thread is now over 4 years old though. Please refrain from posting in older threads in the future.

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