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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Whats everyones MPG on your LT1/4’s

   
Old 03-24-2013, 06:35 PM
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Default Whats everyones MPG on your LT1/4’s
All rebuild’s included stockers, 355’, 383’s, 396’s. Note only if you drive yours on the street.
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Old 03-24-2013, 06:46 PM
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Mine is fairly mild. I'm seeing 22-25mpg with 99% steady highway at 70mph.

I drive 140 miles round trip daily for work, and have 1 mile of in town on each end.
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Old 03-24-2013, 06:49 PM
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Originally Posted by Nophix
Mine is fairly mild. I'm seeing 22-25mpg with 99% steady highway at 70mph.

I drive 140 miles round trip daily for work, and have 1 mile of in town on each end.
sheesh that is quite the commute
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Old 03-24-2013, 07:15 PM
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Stock was 28mpg on the freeway.

Haven't checked it since.
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Old 03-24-2013, 07:47 PM
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make 21mpg at 65 highway, 10-15 in town depending on my driving with mods in sig
Last edited by englundjd; 03-24-2013 at 08:36 PM.
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Old 03-24-2013, 08:04 PM
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I average 20mpg no matter what I do. I could go out racing, could be stuck in traffic, could do 65mph everywhere I go; I always get 20mpg.
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Old 03-24-2013, 08:09 PM
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I average 7-8 mpg on E85. Used to get ~14 with the 6 speed on E85.
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Old 03-24-2013, 08:15 PM
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when I had my 95 z28 with full bolt-ons i would get 16-19mpg religiously... I was 16 at the time however.
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Old 03-24-2013, 08:27 PM
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Full bolt-ons,true duals with 3.42s and 18s
29mpg, 452 miles from 1 tank all highway various speeds
Then I added 4.10s and mileage went to 26, WAY MORE FUN!
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Old 03-24-2013, 08:58 PM
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20 mpg on the nice long hwy jaunt. 18 just milling around. Might check out my 02 sensors here soon to try and squeeze out another mpg or 2.
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Old 03-24-2013, 09:33 PM
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18 on a near stock m6 highway and city driving
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Old 03-24-2013, 10:30 PM
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16 mpg combined on my shitty tune. Then again, this could be perfectly reasonable for a car with a cc503 and full bolt-ons.
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Old 03-24-2013, 10:33 PM
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10-14 city, 24 highway at ~70. Running rich, needs o2 sensors and a tune
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Old 03-24-2013, 10:55 PM
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I got around 15 city on my last build, it was a stalled auto though and they suck for city driving MPG.

New build...will be maybe 7-8?.

After a certain point you have to measure SMILES per gallon .
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Old 03-25-2013, 12:11 AM
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The one time I checked it was on my way home from vegas. I had me and 2 other guys with all our luggage. Its mostly freeway but I got 29mpg with bolt on and a supercharger
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Old 03-25-2013, 01:19 AM
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Stock I did it by tank, 340 if it was all highway, 220-250 with some city with highway. On the 396 it was like 125-175 and that was 104 octane.
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Old 03-25-2013, 01:25 AM
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I got 27-28mpg with bolt ons and heavy ZR1 rims on a roadtrip a few summers back, which included mountain roads and a few spirited speed runs.
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Old 03-25-2013, 02:59 AM
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boosted 385...thru m6 & 9"

15/22+
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Old 03-25-2013, 06:30 AM
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15-18 usually. All highway its gotten 27.

My drive is 3 miles so it barely gets warm = crap mpg.
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Old 03-25-2013, 07:13 AM
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200-250 miles per tank when I was partial bolt ons, 3200 stall, 3.73's and a CC306 with a heavy foot.
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