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11-11-2007, 04:52 PM
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#1 |
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Spear and magic helmet!
Join Date: Oct 2006
Location: Nashville, TN
Posts: 1,226
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I-6 gas mileage
Just out of curiosity, what kind of gas mileage do our trucks get with an inline 6 instead of a V8?
I know if I keep my foot out of my 350 on my Rustride, I get around 15. My drive is mostly freeway, though.
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-- Will |
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11-12-2007, 12:11 AM
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#2 |
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Right on the line, baby!
Join Date: Oct 2003
Location: Phila, PA 19130
Posts: 1,486
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Re: I-6 gas mileage
I don't have personal truck experience, but my 72 Nova got about the same as my truck. I've heard folks post that they don't get much better out of the I6 engines.
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83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here! |
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11-12-2007, 12:19 AM
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#3 |
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Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
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Re: I-6 gas mileage
bout the same --- bad
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11-12-2007, 07:58 AM
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#4 |
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Spear and magic helmet!
Join Date: Oct 2006
Location: Nashville, TN
Posts: 1,226
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Re: I-6 gas mileage
Well, poop! I was hoping to have a great excuse (gas mileage) to score a truck with an inline 6.
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-- Will Last edited by killthewabbit; 11-12-2007 at 08:01 AM. |
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11-12-2007, 11:23 AM
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#5 | |
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Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
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Re: I-6 gas mileage
Quote:
Well -- if its an excuse you need for yourself-- think about how cool they are with dual Mikuni's on an Offy intake with a set of Clifford headers and that great big finned Offy valve cover. If you need an excuse for the wife -- start it off with flowers and a decent meal out on the town (or a movie - my wife loves to go to movies, but i hate to go, so anytime i take her, i can do no wrong for at least 8-10 hours) The big 6's got mediocre gas mileage because they usually were teamed up with deep gear ratios (4:11, sometimes 4:56) and the 3 speed or granny 4 speed trannys make it sing a song of desperation at anything over 75 -- and they are most comfortable cruising at 55 If you can drive like a PawPaw, then you might squeee 15 or 16 out of one |
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11-12-2007, 09:16 AM
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#6 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,310
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Re: I-6 gas mileage
my truck that had the I6 and the one with the V6 both got about 10-11 mpg combined highway and city my 305 v8 seems to get about 8-9 None have alot of power tho so im going to go to a 350 in the near future
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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11-13-2007, 12:10 AM
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#7 |
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THE VILLIAGE IDIOT
Join Date: Nov 2006
Location: Tooele, Utah
Posts: 1,405
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Re: I-6 gas mileage
my dad always got 18 to 22 mpg with his straight six trucks....but he drives like a old man,,always has, but he can sure pull the miles out of a beater....i would love to have a straight six for the mpg..but i know i would hot rod it, so i might as well get a big block....
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honestly honey,,i have no idea how that truck got here. 
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11-13-2007, 12:24 AM
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#8 | |
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Right on the line, baby!
Join Date: Oct 2003
Location: Phila, PA 19130
Posts: 1,486
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Re: I-6 gas mileage
Quote:
I haven't checked the 406 mileage. Don't want to.
__________________
83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here! |
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11-13-2007, 12:49 AM
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#9 | |
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Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
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Re: I-6 gas mileage
Quote:
a vintage inline 6 probably has about the same performance level as a 305 or a smog era 350 though. I looked at 73-87.com at some of the old magazine scans -- the 0-60 times of these old trucks were horrible unless they had a big block - we've really come a long way |
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11-13-2007, 01:09 AM
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#10 |
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Registered User
Join Date: Sep 2007
Location: PA.
Posts: 178
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Re: I-6 gas mileage
All my past Novas with sixes had either the 230 or 250, so they would do pretty good on gas.......18-20mpg.
But my truck's another story. The 292 was getting 10-11mpg. before the tranny swap. I haven't driven it enough yet with the O/D tranny to calculate my gas mileage, but I'm hoping to improve it to 14 mpg.
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_____________________________________________ 69 C-20 292, 4 spd O/D, 4:56 rears. No a/c p/s p/b p/w......restoration project,"Operation:Stovebolt" 78 C-10 305 TH350 new (old) daily driver 02 Suburban Z71 a.k.a. the family truckster 99 Silverado 1500 Z71 |
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11-13-2007, 03:24 AM
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#11 |
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THE VILLIAGE IDIOT
Join Date: Nov 2006
Location: Tooele, Utah
Posts: 1,405
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Re: I-6 gas mileage
if i can still get the 6mpg i was gettign otu of my 454 i will be happy...if the new timeing chain will get me a coupel more mpg i will be estatic...why i drive a stock 454 that gets 6mpg i dont know,, maybe i need theraphy... i would personaly love to have a straight 6 truck,,im gettign nastalgic in my old age,,well as i head towards old age..i like the more simpler things from when i was a kid....
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honestly honey,,i have no idea how that truck got here.
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