MPG comparison...How's yours?

[Lo Blu62]

I have a '62 C10 longbed, 327 mated to a TH350 auto, and 3.08 diff, and I'm averaging 8.5MPG with a light foot. How's your MPG with your setup?

[64shortbox]

64 fleet short box, 305 with 350 turbo 3:08 cogs 9 mpg.

[hd74]

1962 suburban,454,qjet,307 rear ,700r4,i have seen 13 mpg

[Indian113]

350 with a 700r4 and 3:73's 28 in tire 12-15 highway driving

[KBoz]

1961 apache long bed 4.8 vortec LS motor with 4L60e and 3.08 rear end i get about 18mpg to 21 mpg depending how much i play with it

[Lo Blu62]

Originally Posted by KBoz

1961 apache long bed 4.8 vortec LS motor with 4L60e and 3.08 rear end i get about 18mpg to 21 mpg depending how much i play with it

Wow. Makes me think of doing a swap-out just for those kind of numbers.

[KBoz]

yea i glad i went the fuel injection route.. i can cruise on the highway at about 1500-1700 rpm at 65-70

[NEWFISHER]

Still have to get the speedo / odo working in the 65. The 350 world heads, cam ,edlebrock manifold and 600cfm seems to be about 12 if I had to guess. Running 4:10s and 700r4.

The 50 burb with a built 250, 390 Holley, 700r4 , 3:73s and a 29" tire gets 19 mpg

[Lo Blu62]

My 650 double pumper is hurting my mpg.

[TJ's Chevy]

Don't know what mine gets....thinking with 3.90's...30 inch tire...stock transmission and a 292 with a 4 barrel and HEI....MIGHT be getting 16 mpg in 4th cruising a 55 mph.

[66Submarine]

I was getting about 14MPG with my C-30 (9' stepside one ton) the last time I checked. Wore slap out 195HP 2bbl 283, SM420 four speed, 4.10 gears, and 32" mud tires on the back.

The "double pumper" feature is only relevant when you are opening the secondary circuit, so I really doubt that's hurting you. (Unless you have a light foot and a non-existent throttle return spring, lol.) The overall tuning may be a good bit off, though. I also don't know just how much the auto-majik TH350 hurts mileage as opposed to a manual trans or late model auto.

[hopped up]

I get 13mpgs . 373 gears and a 350 tranny

[LT1 Burb]

I get 17-20 , 3:73 700r4 with lt1

[Captainfab]

My '66 Suburban with a mild 454, TH400, 3.42 gears and a 28" tire was getting about 11 mpg. Didn't seem to make much difference how I drove it.

[64tantruck]

Im getting about 12mpg with 64 C20 350 with T-350 tranny 3:73 gears

glenn

[boucher racing]

Turbocharged inliner
350cfm Holley 2bbl
T5
3:08 rear gear
29" tire

17 mpg- city/hwy mix

[ob1monkey]

Cammed 350, t-5 2.95 first .7 5th, 3.08 and 27 in tires. I get 15 city 13.5 highway. at 65,70mph. 66 longbed

[BR3W CITY]

66 Short-step. Cammed LQ4/built 4l80e/3:73's and MT DOT streets. 400hp, 14/19mpg

[ACK]

250ci with TH350 and 3.73 diff - 12 city and 14.5 highway

[kieth]

350tbi, 700r4, 3:73, 30" rubber

14 in town, 16 on hwy at 65mph

[steveb64]

I'm at 9 mpg city, 9 mpg highway, 9 mpg all the time.
Mild+ Cadillac 500, TH400, Holley 870, 3.73 factory limited slip, 28" tires, lots of torque, big right foot.

[Clyde65]

I get around 19 on the hwy and mixed im getting about 16 if I dont attempt any showing off.....

[T2vigil]

19.3 crusing at 55 on the highway. Slighly modified 250. Cam, flat top pistons, ported and polished. .373 rear end gives me 2500 RPM @ 55.

[gimmy 64]

350 mild build
354 gears
28 in tire
2004r tranny
13.5 70 mph 2100 rpm

[familyfast64]

I honestly think mpg is so low because of aerodynamics. I live in Kansas where its always windy and it seems both cross winds and head wins really set you back.

I have a 383/th350/9" with 3.56? Or something close to that. I doubt I get 10mpg but I really haven't st down and figured it out. Runs strong tho and hooking up vacuum advance and tunning with a vacuum gauge helped. Oh and I'm running bias ply m50s from Mt. And world heads with a 770 street avenger and Edelbrock performer rpm.