white1

iTrader: (5)

I picked up a lot with the LS1 fans in my rcsb Z-71. I just about crapped my self when I got 17 on the highway. But I drive fast, I've heard they really burn a lot more gas over 70 mph. So I guess.....S-L-O-W D-O-W-N.

CHEVY6000VHO

iTrader: (2)

Well I'll but in with my LQ9 6.0 H.O, VHO edition Silverado.
When I drive my truck easy (keeping rpm's below 2,000 & drive at 65 mph) I'll average 16-18 city and 19-21 hwy. I even once seen 23.5 mpg by setting cruise at 65 with A/C off.
It all depends on your driving habbits. I can get as worse as 9-11 averages by running the sh*t out of it. But with the price of my 93 oct Shell fuel I run every day, I don't do that very much.
So I know if my 6.0 can get great fuel economy, then the 4.8 & 5.3L can too.
Save the gas consumption for the track!

Hey-->chevymec<--? What kind of mods does your Z28 have to be running 12.5's @ over 110mph in the 1/4 mi?

Jim

chevymec

iTrader: (19)

Has anybody here that is getting higher mpg put smaller tires on their truck and not programed it for it?? One thing I do notice is that most of the guys gettting better mpg have 3.42 gears.

Chevy6000VHO, pm sent.

TXsilverado

iTrader: (19)

i got 620 miles to a tank 2 or 3 times. ALL highway with no ac and no load, but in a pretty hilly stretch of road. i was chugging into the gas stations though

Fogle07

iTrader: (5)

i filled up the other day and yesterday i went to jax and back and ive put about 230 miles on it and its still on half a tank. running 80-85 all the way to jax. i drive with a heavy foot also.

TXsilverado

iTrader: (19)

its that 2nd half that seems to get sucked down too fast

1FUNZ71

I have 3.42's in the Z71. My 04' had 3.73's but was a rcsb 2wd.

1slow01Z71

iTrader: (36)

The first quarter tank I can get like 135-140 then the last quarter Im lucky to get 85. I get around 14.5 with mixed driving. Just city I get 11.5 cause of my foot and stall. I get 16 on the highway runnin 80. If I spray a bottle of nitrous then I get about 11 with mixed driving a run from 0-120 with the nitrous will drop the gas gauge a white mark(I guess its a 1/16th of a tank ) Oh well.

jleews6

iTrader: (1)

I drive my rclb 5.3 from massachusets to virginia 700 miles every week and I can make it all the way on one tank.
I notice alot of you guys can fill up with 25 gallons but how come my truck takes 35 gallons? The best I have got so far is 21.2.
I hope that a tune, cai, fans and a cat back will get me 24 to 25.

tdrumm

iTrader: (18)

Your truck is a long bed which has a bigger tank. Short bed = 26 gallon tank.

I average 14.5 around the city, which is full throttle - full brake type driving. On the high way last trip I got 19.6 with the A/C on.