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Old 02-08-2008, 12:37 AM   #1
philthy

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Default Gas mileage comparison

What do you think gets better gas mileage:

1972 Chevy K20 4X4 350v8 (2bbl), 3 speed auto part time 4WD

or

1971 Ford F250 2WD 390v8 (2bbl) 3 speed auto


Both engines stock.
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Old 02-08-2008, 12:58 AM   #2
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I found this truck in really good shape.

Has 350 v8, M20 muncie, part time 208 xfer case and power locks/windows. Has 158,*** miles. It's an 81. But he wants 2600 for it. Not TOO bad but more than I've got lol. If I wasn't making payments on the Audi I'd snatch it up quick. Then I'd rust proof the hell out of it. I hate rust...
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Old 02-08-2008, 01:23 AM   #3
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Wow, I just did a progressive (my carrier) quote to replace my Fiesta, and it's $2 less per month lol.
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Old 02-08-2008, 02:11 AM   #4
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Considering both vehicles are in perfect tune, I would guess that the Ford should get better gas mileage. 4 wheel drive is a lot of extra weight to drag around. That being said I would much rather have the 4wd, cause I wouldn't be commuting with the truck anyways. For what its worth I have a 78 Ford F100 2wd 302 auto that gets about 17-18mpg mixed mostly country driving at 55mph.
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Old 02-08-2008, 04:07 AM   #5
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In my experience Fords have never been great on gas when compared to other similarly equiped vehicles, but since the bowtie is a 4x4, it will probably be a little less than the Ford.
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Old 02-08-2008, 05:24 AM   #6
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man the ford will probably get a little better mileage, but where u are at i would go with the 4x4
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Old 02-08-2008, 06:33 AM   #7
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I would say the 2wheel drive would. BUT I will never own another 2wheel drive truck agian.
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Old 02-08-2008, 07:02 AM   #8
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Don't even consider a 4x2 if you're going to Maine.
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Old 02-08-2008, 07:29 AM   #9
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Your talking about large, american v8 vehicles running on outdated technology. Mileage is gonna suck. Who cares. Get the 4wd....it cant be THAT much worse.
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Old 02-08-2008, 05:28 PM   #10
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To me, 18mpg compared to 15mpg is a big difference. Sure both suck, but it doesn't make any sense to say the difference doesn't matter. In any case if you need or think you might need 4 wheel drive thats probably the better choice. Some people take the whole "mileage doesn't matter on an old car" thing so far, I can't f'in stand it. They act like because it's not gonna get 40mpg it might as well only get 10mpg who cares. That doesn't make any sense to me at all. I drive my 84 Cutlass all summer long and when I first put it on the road and it had a bent metering rod (didn't know) it was only getting maybe 15mpg and it was killing me for gas $$. After fixing it it got over 20 and cost a lot less per week. I can afford to put some gas in it cause I don't have a car payment or any $1000 repairs on these cars as I can get most parts for free and do the work myself. That and insurance being cheaper makes it cost efficient to have the kind of car that I like. I've never had a 60's or early 70's car maybe they cost more to run, but I completely disagree with anyone that says that having an 80's G body as a daily driver is an expensive hobby, cause its not!
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Old 02-08-2008, 06:37 PM   #11
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Quote:
Originally Posted by IIIQuaZIII View Post
Your talking about large, american v8 vehicles running on outdated technology. Mileage is gonna suck. Who cares. Get the 4wd....it cant be THAT much worse.
On newer vehicles going from 2wd to 4wd will normally net you about a 2mpg loss. Since you are comparing two completely different engines and 2 to 4wd.....

If all was equal with C.I. determining fuel use and losing 2 mpg when in 4wd I'd guess the chevy would use just barely more fuel.

Last edited by MikeB : 02-08-2008 at 06:39 PM.
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Old 02-08-2008, 06:49 PM   #12
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I am guessing fewer CID = better gas mileage. BTW, my '01 F250 V8 gets 11 around the city and about 15 on the highway. I wish I would have gone with diesel.
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Old 02-08-2008, 07:05 PM   #13
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The 2 bbl will also kill your gas milage. ANY 4bbl will give you better milage if you stay out of the secondaries, because you have progressive fuel delivery. You use smaller primaries than a 2bbl butterfly, and when you nail it, you have at least that large a secondary side to give you a 'lil kick.
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Old 02-08-2008, 07:06 PM   #14
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my 1500 2wd w/t 4.3 gets 24
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Old 02-08-2008, 08:19 PM   #15
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depends what their rear gears are too.

that 81 has an m20? i've never seen a car muncie with a transfer case on it, trucks have a muncie too but its completely different.
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Old 02-08-2008, 10:03 PM   #16
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I think they'd be pretty close. The 4x4 can't help, but overall, Chevy gets the best mileage, followed by Ford, and last but not least Dodge. Go for the Chevy or get the Ford and carry lots of blankets.
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Old 02-08-2008, 10:11 PM   #17
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I think it's a M20. I looked up tranny parts and it listed an M20 as the transmission. There's only 1 other 4 speed listed, but looks unfamilar:


http://www.partsamerica.com/ProductL...+Front+Bearing
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Old 02-08-2008, 10:24 PM   #18
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I just talked to a buddy who builds Pro Jeeps (rock crawlers) and it's most likely (like 100%) a SM465 or as the factory calls CH465. He says being an 80's model, it'll have a 32 spline output shaft and 6.55 first gear. It's also about THEE strongest of all factory tranmissions ever offered in sub 1 ton trucks. Say's he's got a guy in New Mexico running a blown 454 in front of a stock unit and it spins the 44's with ease.
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Old 02-09-2008, 06:34 AM   #19
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Go with neither of those trucks. Get an '80s square body with a TBI 350 and overdrive. My old K-5 averaged 18 mpg, with 33" tires (and the top off )
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Old 02-09-2008, 09:42 AM   #20
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For some reason, those models don't last around here. No body seems to wash them and they rot out. Even 2000ish models have wheel well rot. People just get those damn auto car washes with the lame "undercarriage" wash. I spent $7 in quarters washing my Fiesta the other week. Takes alot more than just a quick spray to wash away hard ice and salt. I do really like the truck I posted above (picture). It has a bullet proof drivetrain (I've heard the SM465 really is pistol proof) and the body is in good shape. For Minnesota, the price is right. It has a 8.5 front axle and 12 bolt rear. NP 208 transfercase.
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Old 02-09-2008, 10:15 AM   #21
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I had a standard cab 72 chevy 2x4 350 4bbl/TH350/4.10s and It would get 14-17 fairly consistent..

My old man had a super cab 76 F150 2x4 360 2bbl/4 speed/3.50s and it would get 12-14 on a daily basis...

My brother and I built a 77 F150 with a 390 2bbl, 4 speed 4.56s and 38 super swampers... it would get 6-8 MPG


In my experience Fords have the best heaters, Chevys *tend* to get the best mileage in stock form. An experienced tuner can eliminate that "perk" with relative ease.


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I think they'd be pretty close. The 4x4 can't help, but overall, Chevy gets the best mileage, followed by Ford, and last but not least Dodge. Go for the Chevy or get the Ford and carry lots of blankets.
Don't tell that to my 85 4x4 ram with a 318 2bbl/TF727/3.55s with 31" tires knocking down 22 MPG in mixed driving... Or my 95 Dakota with 450 screaming ponies that would pull 23 MPG @ 75 MPH... they might get upset and go on strike...
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Old 02-09-2008, 10:16 AM   #22
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Don't know if this would interest you, was posted yesterday. Not mine.
1985 GMC 4 x 4
Needs carberator & brake work.Painted blue,$1,000 firm.Call after 3:00pm.
Contact: Dave Pierce, 712-336-8122, 116 28th Street, Spirit Lake, IA, 51360
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