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Old 03-17-2005, 07:06 AM   #1
gregbr
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How much gas mileage do you get???

I was wondering how much gas mileage people were getting with different engine/trans/gear ratio combos. Tell your MPG and your drivetrain please.

My 97 Chevy 4wd extra cab gets 14.5 MPG with the 350/4l60e/3.42 ratio rears (I think).
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Old 03-17-2005, 07:42 AM   #2
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1969 C-10 short stepside, 350/350TH, 3.73 rear gears, 3700 lbs. I get 16 around town. Never checked the highway but the rear gear would hurt mileage for sure.
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Old 03-17-2005, 07:52 AM   #3
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I reckon about equivalent of 14mpg.. 350SBC, TH400 and I think that's a stock rear end I'm running.
Bizzare thing is I get that ALL the time, towing 75mph everything!! is pretty weird....it only fluctuates by about 1MPG kinda weird I think...
but there ya go....
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Old 03-17-2005, 11:34 AM   #4
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Consistent 16 MPG, stock 230/3spd/3.73. Brian
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Old 03-17-2005, 11:37 AM   #5
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502HO -400 turbo-3.07 Posi=10-11mpg highway (if you keep a "light" foot)
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Old 03-17-2005, 11:38 AM   #6
boraxman
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350/350 3.42 rear, dont know what kind of mileage , dont want to know
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Old 03-17-2005, 11:54 AM   #7
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307/350 stock rear (3.73?) and a 2BB carb. I only get 12MPG. Hmmmm. Maybe I need to rebuild tha carb?
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Old 03-17-2005, 12:01 PM   #8
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1.6L 4 speed manual trans with a 3.42 rear axle, getting 42 miles per gallon..... Whoops that was my chevette I use to have God I am missing that mileage now.

my 67 shorty with semi modified 355ci, 3 spped manual, 3.73 rear... 15mpg if your really sweet on the right petal..
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Old 03-17-2005, 12:05 PM   #9
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my 4x4 s10 with a 2.8 v6, 5 speed, and 3.73 rear end gets about 24-26 when i am driving back and forth from school and i get between 20-22 when i am at home driving to work
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Old 03-17-2005, 12:09 PM   #10
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67 Chevy 350/700R4/3.73. 14 town 16 highway
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Old 03-17-2005, 12:24 PM   #11
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uk72step, I had a 69 4wd blazer years ago and I put the torker 2 cam in and it got 11 MPG no matter what you did. Yes, it's wierd.
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Old 03-17-2005, 12:32 PM   #12
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Thanks a ton for posting this thread. I wanted to see a similar thread, just didn't want to be the guy who started it

I've got a 68 step SWB w/L6 250 with a 1bbl carb and 3 on the tree. I get ~15-16MPG on the highway from what I can tell (65-70MPH). Not sure about city miles. The truck has plenty of 'pep', but I want to put something bigger in it. Not thinking as big as an LS1 or LT1 - more like the 4.8L V8 vortec engine that was in my '03 Sierra. I got 19-21 MPG highway with aftermarket intake and one of those hypertech programmer things.
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Old 03-17-2005, 03:49 PM   #13
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71 1 Ton Longhorn, 402, 700R4, 4:10 or 4:11 rear gear. 11MPG uphill, downhill, empty, full, towing or not. 11 MPG in town or highway..........but, man, can that thing pull my water trailer uphill! I get asked all the time what it has in it, cuz I pass everybody going up the hill.
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Old 03-17-2005, 04:08 PM   #14
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1972 C20 4:10 dana 60 rear 700R4 trans can't remember tire size but they are at least 33" 400 hp 396 she gets about 5 mpg. 1986 K10 10 bolt 3:08 rears 700R4 trans stock 305 gets about 10 mpg...

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Old 03-17-2005, 04:16 PM   #15
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He[[, it's been so long since I drove screamin, I dun forgot

307 w/4brl and HEI / TH350 / 3.73 gears / 275/50/15 skins = 13MPG

With the gate down I can squeeze out 14MPG
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Old 03-17-2005, 04:20 PM   #16
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1989 - MY BEAT UP DAILY DRIVER (HOND@) 37 MPG

1970 - 250/350T/4.10 AROUND 16-20 (SOLD TO GEN3)

1967 - 400/PG/3.73 AROUND 8-12 (SOLD LAST SUMMER)

"GQ" - 425HP - 350/350T/NP205/3.08'S (NOT GOOD ???)

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Old 03-17-2005, 04:34 PM   #17
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72 4x4, stock 95 350 with quadrajet, 350 trans, 31" tires, 3.43? rear end, 11 MPG, 12 with the tailgate down. city & highway for both. but i know i am running rich, just havent taken the time to adjust.
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Old 03-17-2005, 04:53 PM   #18
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2001 2500HD 8.1 6 speed 4.10-12mpg 2000 Tahoe 5.3 16-17mpg 92 f-250 460 auto (short trips only) 5mpg...what a gas hog
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Old 03-17-2005, 05:29 PM   #19
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355/350 buit with a dana 60 4:10 rear gear around 5-7 but thats with a 17 year old foot and duel 450 holleys but during those couple miles she hauls ass!!
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Old 03-17-2005, 05:35 PM   #20
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70 CST 383 TH350 GV overdrive 3:07 gears.....around 15 in town. Don't know on highway.

70 C20 454 TH400 - best so far 10.4 (WOW!)

49 CJ2a Jeep - 18-19 MPG

2002 VW TDI Beetle, 51 MPG highway, average 44 city.

VW can make high mileage claims for their cars because you don't have to buy fuel for them when they are sitting in the service bay!
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Old 03-17-2005, 05:40 PM   #21
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My '71 with a 350/350 and 3:73's out back, it gets 12 no matter what I'm doing. The '97 pointiac grand prix GTP that I bought two weeks ago get around 20 in town and 26 on the highway, and its supercharged.
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Old 03-17-2005, 06:06 PM   #22
72 Cheyenne402
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402/400th/373 posi

I don't think about it!!!
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Old 03-17-2005, 06:19 PM   #23
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'71 4x4 LWB, 350 V-8 with 2bbl Rottenchester, stump pullin' 4 speed and 4:11 gears. 31x10.50x15's, keep it at about 60 and can squeeze out 11+ on a good day. Push it to 70-75 and watch the gas needle move.
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Old 03-17-2005, 06:36 PM   #24
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Man, after reading all of these posts the question should have been, gas mileage, whats that???
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Old 03-17-2005, 06:57 PM   #25
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My 96 350/4l60e 3.42 31x10.50-15, 2wd...average 13-15 around town (depends on foot). Highway around 17-18 @ 70-75.

70 with the 250 3 speed, I think 3.73 probably around 11. But it is not driven much and it takes a while to get it untempermental (long warmups)
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