Typical gas mileage with a 454? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1986Silverado · 09-30-2004, 04:16 PM

The dually I am looking at has a 454 in it and I am worried about the gas mileage if I buy it. The owner said the gas mileage was "horrible"

I would only use it for back and forth to work(12 miles round trip daily)and to tow a boat and travel trailer, which hasn't been bought yet. Any suggestions and/or tips would be great. By the way I did a search on 454 and it came back with no matches

Anybody wanna buy my '86 Silverado? J/K right now!

MylilBowTie · 09-30-2004, 04:31 PM

Most are about 8-10 mpg roughly.

ponjohn · 09-30-2004, 04:43 PM

Mine is an 85 dually, 454,t400,4.10 rear. 8.5 is as good as it gets loaded or empty.

A friend has a 92 with the injected 454 and he gets 10.5, his is ext cab, dually, 3.73 rear.

I would love to put a 4l80e in mine- but simply dont have the funds right now.

John

1986Silverado · 09-30-2004, 05:24 PM

This one is an 88 so it is fuel injected. It needs some body work and paint but for $1500, it's very tempting!

If I was to buy it, the 99 burb would be history and my wife will be getting something smaller and more fuel effecient

cliffsta · 09-30-2004, 05:27 PM

why sell the 99 burb to get the dually, when you said the dually is to haul people and things?

1986Silverado · 09-30-2004, 05:31 PM

Quote:

Originally Posted by cliffsta

why sell the 99 burb to get the dually, when you said the dually is to haul people and things?

I would be selling my 86 to buy the dually, and can't afford gas for two gas hogs. Also the burb can't pull a 5th wheel and also would need stabilizer bars to pull a bumper pull travel trailer. Plus it(suburban)is really not practical for my wife, she needs something smaller

cliffsta · 09-30-2004, 05:33 PM

10-4. makes more since now.

ponjohn · 09-30-2004, 06:04 PM

yup- just sold a 95 dodge dakota and bought an outback. went from 14 to 22mpg and more on the hwy. I heard this morn that gas will be at 2.50 before years end.

john

76HighSierra · 09-30-2004, 08:39 PM

The truck in my signature gets about 9mpg (loaded or empty) in the city, and i've gotten as high as 16mpg (empty, except for two people and two full gas tanks) with it on the highway. My average mpg on the highway @70mph has been app. 13-14mpg (loaded or empty). many folks say that's pretty good for a 454, but take into consideration that this truck runs like a clock, is always kept in excellent tune and I don't have a heavy throttle foot. 454's may be a bit hard on fuel, but DAMN you can't beat that torque!!

For a truck, it's far better to have that torque and not need it, than it is to need it and not have it.

ElGracho · 09-30-2004, 09:00 PM

I just got back from a trip to Montana with my 83 Crew cab dually with a 454. I got between 6 and 8 mpg pulling a loaded car trailer both ways. That mileage is terrible. I would love to put efi and a 4L80E in that truck but I may end up with a duramax before I do that...

I would stay away from the 454 for anything you have to drive daily. I love my 86 with the 6.2 diesel for that... 23 mpg...

cochran63 · 09-30-2004, 09:31 PM

Will a 427 get better mileage than a comparable 454?

09-30-2004, 04:16 PM	#1
1986Silverado What I drive Join Date: Apr 2004 Location: Star, MS Posts: 418	Typical gas mileage with a 454? The dually I am looking at has a 454 in it and I am worried about the gas mileage if I buy it. The owner said the gas mileage was "horrible" I would only use it for back and forth to work(12 miles round trip daily)and to tow a boat and travel trailer, which hasn't been bought yet. Any suggestions and/or tips would be great. By the way I did a search on 454 and it came back with no matches Anybody wanna buy my '86 Silverado? J/K right now! __________________ 1986 Chevy Crew Cab Dually(Choo-Choo Conversion) 2006 Chevy Equinox

09-30-2004, 04:31 PM	#2
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Most are about 8-10 mpg roughly. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

09-30-2004, 05:24 PM	#4
1986Silverado What I drive Join Date: Apr 2004 Location: Star, MS Posts: 418	This one is an 88 so it is fuel injected. It needs some body work and paint but for $1500, it's very tempting! If I was to buy it, the 99 burb would be history and my wife will be getting something smaller and more fuel effecient __________________ 1986 Chevy Crew Cab Dually(Choo-Choo Conversion) 2006 Chevy Equinox

09-30-2004, 05:27 PM	#5
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	why sell the 99 burb to get the dually, when you said the dually is to haul people and things? __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

09-30-2004, 05:33 PM	#7
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	10-4. makes more since now. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

09-30-2004, 04:43 PM	#3
ponjohn Registered User Join Date: May 2002 Location: woodbridge, ct. usa Posts: 145	Mine is an 85 dually, 454,t400,4.10 rear. 8.5 is as good as it gets loaded or empty. A friend has a 92 with the injected 454 and he gets 10.5, his is ext cab, dually, 3.73 rear. I would love to put a 4l80e in mine- but simply dont have the funds right now. John

09-30-2004, 06:04 PM	#8
ponjohn Registered User Join Date: May 2002 Location: woodbridge, ct. usa Posts: 145	yup- just sold a 95 dodge dakota and bought an outback. went from 14 to 22mpg and more on the hwy. I heard this morn that gas will be at 2.50 before years end. john

09-30-2004, 08:39 PM	#9
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	The truck in my signature gets about 9mpg (loaded or empty) in the city, and i've gotten as high as 16mpg (empty, except for two people and two full gas tanks) with it on the highway. My average mpg on the highway @70mph has been app. 13-14mpg (loaded or empty). many folks say that's pretty good for a 454, but take into consideration that this truck runs like a clock, is always kept in excellent tune and I don't have a heavy throttle foot. 454's may be a bit hard on fuel, but DAMN you can't beat that torque!! For a truck, it's far better to have that torque and not need it, than it is to need it and not have it. __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.

09-30-2004, 09:00 PM	#10
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,550	I just got back from a trip to Montana with my 83 Crew cab dually with a 454. I got between 6 and 8 mpg pulling a loaded car trailer both ways. That mileage is terrible. I would love to put efi and a 4L80E in that truck but I may end up with a duramax before I do that... I would stay away from the 454 for anything you have to drive daily. I love my 86 with the 6.2 diesel for that... 23 mpg... __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

09-30-2004, 09:31 PM	#11
cochran63 Registered User Join Date: Jan 2004 Location: Oklahoma Posts: 1,057	Will a 427 get better mileage than a comparable 454? __________________ Youth soon passes away, but immaturity can last a life time.

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