8 1/2 mpg - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ocbaud · 11-17-2002, 01:45 AM

yeap, i finally took the time to right my milege down, and i'm only getting around 8.5mpg.

but thats with my timing being adjusted yesterday, and since then, i've probably gone through almost half a tank.

so, time to adjust my timing soon. but i need to buy the label thing that goes on the damper first

Txstruck · 11-17-2002, 11:02 AM

LOL, I used to get the same thing on my dually (454 2bbl) Thats why I dont have it anymore. Filling up every 2 days on a 27 gln tank was killing me!

70sChevys · 11-17-2002, 11:14 AM

Mine gets 12 mpg on a good day and 10 on a bad one...since there's no car payments and my insurance is $40 a month....it's not that bad....to get more than 15 would mean having to go to an efi and a computer controlled truck....that'll be the day....

gchemist · 11-18-2002, 05:31 AM

For a 305??

I get 16-18 in the city!! Is your speedo calibrated right? What tranny are using? You've got some serious problems. Man its time you makes some changes or find the problem.

bigd65 · 11-18-2002, 09:48 AM

Iget 14-15 (350/700R4 and built with extras) i agree with G, maybe your speedo aint right. does it seem like its right like how far your normally drive and how often you have to fill up

bigblock73 · 11-18-2002, 01:18 PM

8.5!!!!

my BB will get that...and you only have a little 305.

ocbaud · 11-18-2002, 01:41 PM

speedo was PERFECT before i put the new wheels/tires on, now it reads about 2mph slower

Big Paul · 11-18-2002, 09:49 PM

Eric, you have a TH350 don't you?

I would suspect that, and an untuned carb. to be your problems.

Good luck.

BTW: My Big Block 2.8L can get 30MPG on the freeway. :p

ocbaud · 11-18-2002, 09:55 PM

Quote:

Originally posted by Big Paul
Eric, you have a TH350 don't you?

I would suspect that, and an untuned carb. to be your problems.

Good luck.

BTW: My Big Block 2.8L can get 30MPG on the freeway. :p

yeap, th350 and old qjet.

i'll replace the plugs as soon as i buy metroid:prime tommorow

that will help

gchemist · 11-18-2002, 10:31 PM

Go www.tciauto.com and get the right gears for your tire combo. Don't ya'll do something else besides eat the Okie meets?

11-17-2002, 01:45 AM	#1
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	8 1/2 mpg yeap, i finally took the time to right my milege down, and i'm only getting around 8.5mpg. but thats with my timing being adjusted yesterday, and since then, i've probably gone through almost half a tank. so, time to adjust my timing soon. but i need to buy the label thing that goes on the damper first

11-17-2002, 11:02 AM	#2
Txstruck Registered User Join Date: Nov 2002 Location: Dallas Posts: 459	LOL, I used to get the same thing on my dually (454 2bbl) Thats why I dont have it anymore. Filling up every 2 days on a 27 gln tank was killing me! __________________ Steve 86 K30 4x4 6.2L Diesel\TH400\NP208 - 14bolt FF rear w/detroit locker and Dana60 front w/detroit locker- both with 4.56 gears "Runs on Mud"

11-17-2002, 11:14 AM	#3
70sChevys Registered User Join Date: Sep 2002 Location: Dallas, TX Posts: 69	Mine gets 12 mpg on a good day and 10 on a bad one...since there's no car payments and my insurance is $40 a month....it's not that bad....to get more than 15 would mean having to go to an efi and a computer controlled truck....that'll be the day.... __________________ Kelly C. Hanna MMCC & Southern Bowties Club Hanna Woodworks Classic Chevy Country

11-18-2002, 05:31 AM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	For a 305?? I get 16-18 in the city!! Is your speedo calibrated right? What tranny are using? You've got some serious problems. Man its time you makes some changes or find the problem. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

11-18-2002, 09:48 AM	#5
bigd65 Registered User Join Date: Mar 2000 Location: Clute, TX. Posts: 1,935	Iget 14-15 (350/700R4 and built with extras) i agree with G, maybe your speedo aint right. does it seem like its right like how far your normally drive and how often you have to fill up __________________ 2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe

11-18-2002, 01:18 PM	#6
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	8.5!!!! my BB will get that...and you only have a little 305.

11-18-2002, 01:41 PM	#7
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	speedo was PERFECT before i put the new wheels/tires on, now it reads about 2mph slower

11-18-2002, 09:49 PM	#8
Big Paul Iamnotanofficerofthelaw Join Date: Feb 2002 Location: Turlock, California Posts: 352	Eric, you have a TH350 don't you? I would suspect that, and an untuned carb. to be your problems. Good luck. BTW: My Big Block 2.8L can get 30MPG on the freeway. :p __________________ ~Paul~ '96 C1500 Silverado- Vortec 5.0L/Exhaust/Stock '87 S-10 Ext Cab- 2.8L/700r4 KIA Caught fire 12/7/03

11-18-2002, 10:31 PM	#10
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Go www.tciauto.com and get the right gears for your tire combo. Don't ya'll do something else besides eat the Okie meets? __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

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