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Old 02-27-2011, 04:30 PM   #1
cpisani70@aol.com
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Mpg ?

Does anyone know the mpg on a 1971 C20 LWB 396cu in automatic tranny. I am trying to figure the fuel cost on a long highway trip home if I buy it!
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Old 02-27-2011, 04:34 PM   #2
Sicklajoie
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Re: Mpg ?

Hey fellow Nutmegger!
Where's the truck at?
I think you'll typically expect 10-12, depending on your rear gears. Sounds like you've probably got 4:11's.
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Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183
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Old 02-27-2011, 04:41 PM   #3
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Re: Mpg ?

If original i think it will have 3:54 gears and may get upwards of 12 on the hiway...
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Old 02-27-2011, 04:44 PM   #4
teeitup
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Re: Mpg ?

Wow Eric, I better tell that too my buddy who has a 71 402 1/2 ton, all he gets is 8, no mater how he drives it. I think all my 72 swb 350 4x4 get is 10 mpg if I'm lucky
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Old 02-27-2011, 04:58 PM   #5
cpisani70@aol.com
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Re: Mpg ?

Thanks for the help it is kind of what I figured but maybe I was hoping in "That" year those trucks got 18 mpg that way I could help convince myself to just buy it!!!!!!
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Old 02-27-2011, 08:39 PM   #6
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Re: Mpg ?

Quote:
Originally Posted by cpisani70@aol.com View Post
Thanks for the help it is kind of what I figured but maybe I was hoping in "That" year those trucks got 18 mpg that way I could help convince myself to just buy it!!!!!!
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It is GOOD to have a dream. however, I would surmise that your wish is not in the program. The truck with the items that you gave would be a gas drinking machine. Remember, in those days a gallon cost a lot less.

DON'T let that keep you from buying a truck, you will find a way to finance the cost of the fuel, when you need it. We always do.
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Old 02-27-2011, 04:39 PM   #7
teeitup
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Re: Mpg ?

I bet closer to 8 mpg
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2020 chevy Apex 4x4 crew cab
1969 Z28 with the 302
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Old 02-27-2011, 07:54 PM   #8
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Re: Mpg ?

10 to 12 is a good number to assume on all the 2 wheel drive trucks. Assuming they are running on all 8 that is.
Anything better is awesome, and anything less means you should figure out whats wrong (assuming a stock motor)
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Old 02-28-2011, 02:15 AM   #9
extd56
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Re: Mpg ?

I was getting 10 with my crew cab with the 454 and overdrive.
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Old 02-28-2011, 10:55 AM   #10
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Re: Mpg ?

I had a '72 C-20 with a 350, 4 speed, 4.11 rear and stock tires and all it normally got was 10 mpg. That was way back when gasoline prices were low.
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Old 02-28-2011, 10:56 AM   #11
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Re: Mpg ?

i get less than 10
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Old 02-28-2011, 01:12 PM   #12
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Re: Mpg ?

just figure you need to stop every 150-175miles and put in $70-$80 gas each time
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Old 02-28-2011, 01:19 PM   #13
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Re: Mpg ?

It'll be better after you get it home and don't have to drive it, except when you want to...Maybe the seller will front you a tank (or 2) of gas money. Oh, let him call it a rebate....He's gonna want to sell it to keep from having to put gas in it, so it's a win-win deal.
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Old 02-28-2011, 02:57 PM   #14
ryans69chevy
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Re: Mpg ?

I drove my 69 c10 170 miles and got 17 to the gallon! I drove 63 mph most of the way. I have a 307 with 3:08's. I felt pretty proud!
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Old 02-28-2011, 03:17 PM   #15
propanemudtruck
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Re: Mpg ?

I'm planning on flying to southern cali and hoping to buy/drive back a 67-72 (not picky on anything but a good runner and fairly solid cab) and am going to budget for around 8. I guess anything more than that and I'll be able to get a better meal at the end of the days of driving... so somewhere around $1100 for fuel one way.... I guess I'll make sure those tires are well inflated before I leave!
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