Gas mileage??
 

Let's see what kind of mileage everybody is getting. Please list motor size, transmission and mileage. I'll start it.

4.3 V-6
TH400
18 mpg

5.0 305 V-8
TH700 - 3.07 gears
10 mpg (I blame it on ESC!)

87 350 TBI
700R4 w/ 3.07's
~12mpg

Badly needs a tune-up though... :(

Do this little mod and you can't blame ESC anymore 'cause it bypasses it.
Mike

5.0 tire smoker
700R4
3.08 rearend with 255/60R15's
~15-18 MPG. Lower if I stay on it. :D

305 V8
TH350c
2.73 rearend with 275/60R15's
8 or 9 mpg

:(

What's gas mileage?? :confused:

What's gas mileage? LOL

If it makes you folks feel any better my 1962 Starfire gets around 8 MPG.
You can watch the hand drop on the guage when on it hard.

That's 100+ octane too!!!

My truck;
305
700R4
2.79 gears
14-15 mpg

454, Turbo 400, 3:42 single wheel 14 bolt. 32" tall tires. 6 to 8 MPG on the highway running empty & about 75 mph. 4 to 6 MPG pulling a trailer or empty running 80 MPH (3000 RPM). This is with 92 octaine fuel. dual 20 gallon tanks, 4 miles to the gallon, $2.29 a gallon gas, You can watch the fuel guage move & your wallet empty as you cruise. Do I win?:flag: :gmc: :burnout:

I don't see why you wouldn't win!!!!!
Do you belong to OPEC?????
You should.

Gas mileage heck its a truck i dont pay attention i just put gas in when i need it.lol if i want mileage i drive my wifes car.:D

350 ZZ4
TH350
3.07 rear gears
13-14 MPG in a 5,000 LB. truck minus driver :eek:

1973 350 (Orig motor, maybe rebuilt once.)
TH-350
3.07 rear gears
235/75r-15's (I think :) )

Get 8-10mph on average, depending on how hard I throttle the truck or what grade of fuel I put in.

Have gotten 13mpg a couple of tanks ago, but that was before I went out and tinkered with the carb. ;)

Jeff

85 C10
350 with little mods (cam, ignition, carb)
700R4 with expensive mods (1800.00 now)
3.42 rear and 275x60x15 tires
15 mpg the way i drive :D

could probably be better milage but thats no fun :D

461cid
400turbo/2400 stall
3.08 rear end
8-10MPG

5.0 V8 305 tire smoker (LMAO)
TBI
700R4
Current mileage is 0 (0 miles on 0 gallons)
I used to get 18-21 around town.

1991 4x4/ 1/2 ton sub, 16 hwy

1978 4x4 1/2 ton pickup 14 hwy

Both have 3.73 gears. Sub has overdrive.

Bill

Hmmm
 

11.5 MPG
79 1 Ton, dual wheel Dump bed
350, Granny Low 4 Speed
Edelbrock Performer kit (Cam / Lifters, Intake, Carb)
Will accelerate up the hills here in Tn. pulling a Loaded 2 car hauler...:bowtie: :bowtie: :bowtie:

305
stock except for duals and a performance cam
TH-350C
3:08 gears
11.5 mpg around town

I am in the middle of a cam swap back to stock, and I'm hoping that will help.

Slonaker

i can't see why or how you guys get that bad of mileage in those trucks

i've got a 305 in my el camino with a big cam,intake,carb headers exhaust everything and 4.11 gears in the back and i get around 12 on the highway whining at 5k not that i do it much:P

383 v8
muncie M20
3.42 rear
10MPG

AND

350 v8
2004R w/ 2200rpm stall
3.42 rear
8-10 city, 18 freeway [:eek: ]

Boy, this is really discouraging. Makes the little V-6 look pretty good. But like it was said earlier, "gas mileage??" I think I can live with the added power of the 350. I'll let everyone know what I get with it, too.

C10 2wd
Engine/Motor: Crate 350 (Mexico)
Transmission: sm465 (4-speed manual w/ granny :()
Rear Gears: unknown at this time :)
MPG City: 10-14
MPG Highway (60-70 mph): 11-16 (estimate)

My MPG may be off by a bit. My gauge has a bounce to it due to the f*cked up tranny connection, so Im sure my miles traveled is off some.
My fuel level gauge is also not hooked up, so I get gas roughly every 70 miles or so just to be safe.

I am in the process of going to a tuned port injection system on my 383...I think I am around 12 mpg now, I will see what kind of increase I get after this.

Hmmm..it's amazing how many nice trucks, have little 305's...wow, I guess that 305 was a DAMN popular motor back in the day. Sure glad mine came factory with a 350/4bbl :D