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Old 03-14-2012, 06:53 AM   #26
Goldfinger
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Re: Special Economy Truck?

I can get 26 on the interstate, but 20 in the city is near impossible.
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Old 03-14-2012, 07:08 AM   #27
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Re: Special Economy Truck?

I would've thought that add was for a diesel though
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Old 03-14-2012, 08:05 AM   #28
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Re: Special Economy Truck?

First of all,when has any vehicle gotten the EPA rated MPG? It's always been a farse. Notice there's a big fat 20 in the middle of the page,not the 28. I believe it would be the diesel and they just aren't saying it. People weren't accommodating of the diesel vehicles back then. GM was the only one even offering a diesel prior to '83 and always the one one offering them in light duty trucks and SUVs.
As far as someone getting 32 mpg from a 6.2 in anything goes...people lie. Or maybe it's kinder to say "exaggerate". It just plain ain't happenin'.
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Old 03-14-2012, 08:29 AM   #29
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Re: Special Economy Truck?

i wish there was a big ten that could get that kind of mileage it would be the perfect truck

my 79 with a realy lean running 250 3 on the tree and 3.08's gets like 17 to the gallon
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Old 03-14-2012, 02:06 PM   #30
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Re: Special Economy Truck?

You guys got it all wrong... Those are real numbers, but they only sold those trucks in towns where all the streets ran down hill bothe ways!
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Old 03-14-2012, 02:27 PM   #31
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Re: Special Economy Truck?

^ is there a state with a dealership on top of mt bullsh!t??
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Old 03-14-2012, 09:08 PM   #32
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Re: Special Economy Truck?

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Originally Posted by thirdstreettito View Post
There is a guy on another forum with a 2wd diesel burb getting 32mpg hwy. 6.2/700R4/3:08 or 2:9?
My 4x4 LWB gets 32 highway, using A/C and going 80. I just pop it down a gear for hills rather than push the accelerator down harder.
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Old 03-14-2012, 09:25 PM   #33
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Re: Special Economy Truck?

Red block 6.2 diesel. Completely gutless. But... 25mpg is doable on the highway with that engine. You need to keep close track of the RPMs and not lug it or over-rev...
I've gotten just over 22mpg with my 6.5L twice. My overall average is 19. My Mileage widget tells me I used 3394 gallons of fuel over the last 10 years and 65,440 miles.

Last edited by hatzie; 03-14-2012 at 09:31 PM.
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Old 03-14-2012, 09:31 PM   #34
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Re: Special Economy Truck?

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Originally Posted by Rogue_Alphonse View Post
My 4x4 LWB gets 32 highway, using A/C and going 80. I just pop it down a gear for hills rather than push the accelerator down harder.
Is that 32 litres per 100/k, because I just don't see how you are getting that in MPG.
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Old 03-14-2012, 10:33 PM   #35
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Re: Special Economy Truck?

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Is that 32 litres per 100/k, because I just don't see how you are getting that in MPG.
I'm lucky to get 25 city/back roads LOL

and I HAD a welded rear so my city/back road MPG was worse before I put an open carrier back in it.

I guess it's the gearing. 700 junk R, NP208 junk that blows out of 2hi under hard breaking, and 3:08 ratios. I'm running stock suspension, stock tire size, every like 6-8 months I use fuel booster, I keep my side windows up as much as I can, and I downshift rather than give it more fuel.
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Old 03-15-2012, 06:36 AM   #36
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Re: Special Economy Truck?

My 87 R10 6.2/700R4/3.08's gets 23mpg average, mixed driving - 5 miles city, 14 miles highway, 16 miles country (a stop or turn every 3 miles or so), and 2 miles dirt.

It gets right around 28 at 56mph - just need to keep it in OD and the TCC locked up.

BTW that's at 216, 000 miles, and as far as I can tell it's hasn't been rebuilt.
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Old 03-15-2012, 08:03 AM   #37
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Re: Special Economy Truck?

Some incredible mileage stories with 6.2s. Makes me wonder how two identical engines/drivetrains/tires can get such different (like 10mpg) mileage. My '85 Jimmy w/6.2/700r4/NP208/3.08s/235/75-15s got 22. With diesel torque you can actually keep your mileage when increasing to larger tires and going to lower gears. It now has 12.50/35 tires and 4.10s and still gets 22 mpg. So did my '91 6.2 Suburban with the same axles and tires. That's hwy mileage.
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Old 03-15-2012, 08:11 AM   #38
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Re: Special Economy Truck?

It says it beats a competitors v8 by 47 horsepower. I don't think they could have been talking about a 6.2 diesel...

I'm not bashing them. I've driven 6.2 diesels over 200k miles and seen over 25 mpg a couple times. My 86 that I loved and drove the most would get 23 on the highway on a regular basis.

My best guess is the "special economy truck" was a 305/2.73 geared truck with the manual OD trans (Its still a 4 speed by the way, not a 5 speed. It's a Chrysler/New Process A833 http://www.hemmings.com/mus/stories/...feature17.html)
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Old 03-15-2012, 11:22 AM   #39
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Re: Special Economy Truck?

Quote:
Originally Posted by Rogue_Alphonse View Post
My 4x4 LWB gets 32 highway, using A/C and going 80. I just pop it down a gear for hills rather than push the accelerator down harder.
Are you talking instant average, or average per tank? Either way, you would have prove those claims for me to buy them.
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Old 03-15-2012, 01:34 PM   #40
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Re: Special Economy Truck?

Didn't GM offer a Lock up option in a TH350? Was thinking that they did in the mid 80's kinda odd... Seems I looked at a truck back 10-15 years ago that had a 6cyl / 350TH with a lock up and the guy said he got mid 20's just running around.

My 79 C-10 with a 5.3/60E/3.73 gear gets 20 on the highway. And I drive it like I am late all the time At least getting up to 70ish..
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Old 03-15-2012, 01:46 PM   #41
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Re: Special Economy Truck?

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Originally Posted by special-K View Post
Some incredible mileage stories with 6.2s. Makes me wonder how two identical engines/drivetrains/tires can get such different (like 10mpg) mileage. My '85 Jimmy w/6.2/700r4/NP208/3.08s/235/75-15s got 22. With diesel torque you can actually keep your mileage when increasing to larger tires and going to lower gears. It now has 12.50/35 tires and 4.10s and still gets 22 mpg. So did my '91 6.2 Suburban with the same axles and tires. That's hwy mileage.
The 82 was buit for economy when fuel had spiked to $1.60/ gallon from $0.80 . It had smaller pre-chambers, diffrerent injectors, and a different curve on the DB2. The rear gears were setup to keep the engine in its' sweet spot if you were careful.
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Old 03-15-2012, 03:06 PM   #42
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Re: Special Economy Truck?

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Originally Posted by INSIDIOUS '86 View Post
^ is there a state with a dealership on top of mt bullsh!t??
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I'm still laughing about this one. Well done sir!
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Old 03-15-2012, 04:21 PM   #43
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Re: Special Economy Truck?

Quote:
Originally Posted by ElGracho View Post
It says it beats a competitors v8 by 47 horsepower. I don't think they could have been talking about a 6.2 diesel...

I'm not bashing them. I've driven 6.2 diesels over 200k miles and seen over 25 mpg a couple times. My 86 that I loved and drove the most would get 23 on the highway on a regular basis.

My best guess is the "special economy truck" was a 305/2.73 geared truck with the manual OD trans (Its still a 4 speed by the way, not a 5 speed. It's a Chrysler/New Process A833 http://www.hemmings.com/mus/stories/...feature17.html)
"beats it's closest sales competitor's high mileage V-8"

sounds like double talking jive to me...
I wonder which competitor's V-8 they are talking about...
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Old 03-15-2012, 08:37 PM   #44
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Re: Special Economy Truck?

Interesting topic anyway.
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Old 03-15-2012, 08:39 PM   #45
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Re: Special Economy Truck?

Quote:
Originally Posted by joe231 View Post
"beats it's closest sales competitor's high mileage V-8"

sounds like double talking jive to me...
I wonder which competitor's V-8 they are talking about...
Prolly the 302 Windsor in an F150. I had a W150 Dodge with a 318 and never got over 13 with it on the highway.
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Old 03-15-2012, 08:47 PM   #46
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Re: Special Economy Truck?

in my 86 c20 at 70 i get 20mpg and that is a 350 sm 465 and 3.42 rear gears and that is on the lower side of things have gotten up to 23+ but it was with better gas and a fresh tune
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Old 03-15-2012, 10:04 PM   #47
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Re: Special Economy Truck?

Sounds like the same kind of BS their trying to tell us now on the kind of mileage we can get out of a VOLT. Just make sure that you have a long extension cord that plugs into a Coal powered power plant.
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Old 03-16-2012, 12:33 AM   #48
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Re: Special Economy Truck?

The 305s were,what,165HP? Was the competition's V8 really under 120? I built a Volkswagen engine with 1/2 again more hp than that!

Quote:
Originally Posted by hatzie View Post
The 82 was buit for economy when fuel had spiked to $1.60/ gallon from $0.80 . It had smaller pre-chambers, diffrerent injectors, and a different curve on the DB2. The rear gears were setup to keep the engine in its' sweet spot if you were careful.
Oh,I know all about the 6.2s from '82. I wasn't referring to your claim. It was the 32 MPG I don't believe. And,that's with an '87,not an '82. Mines an '85.
Quote:
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Sounds like the same kind of BS their trying to tell us now on the kind of mileage we can get out of a VOLT. Just make sure that you have a long extension cord that plugs into a Coal powered power plant.
I know a guy with a Volt and it most certainly gets incredible fuel sipping mileage. I agree you have to figure what these cars do to your electricity usage. It's less at the ump and more elsewhere. Not as green as they seem. What about the batteries when they go bad and it costs more than the car is worth. From what I understand the Prius is a disposable car due to the cost of a new battery package. I also heard the pant where they are built is an environmental hazzard.
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Old 03-16-2012, 02:15 AM   #49
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Re: Special Economy Truck?

Quote:
Originally Posted by N2TRUX View Post
Are you talking instant average, or average per tank? Either way, you would have prove those claims for me to buy them.
Basically a couple trips, mostly long-stretched back roads on Delaware Rt. 9 or going up to the Poconos... popping it down a gear for hills to maintain something between 75 and 80mph.

My regular driving, I get 25-27. This includes some city, mostly highway, and mainly 85-100 mph EVERY morning, manually shifting the trans for hills.
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Old 03-16-2012, 03:09 AM   #50
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Re: Special Economy Truck?

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Originally Posted by Rogue_Alphonse View Post
My 4x4 LWB gets 32 highway, using A/C and going 80. I just pop it down a gear for hills rather than push the accelerator down harder.

The thing is, even if it were true, no one would ever believe that. I dont care what method your using to conserve fuel. You got a gas motor and a 4x4 long bed. I got $100 that says you are doing your calculations wrong cause there is no way i will believe you get better then 20 Miles Per Gallon. Especially not at 80 with the ac on. More like 17 tops is what i would believe there.
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