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Author Topic: 26+ MPG!!!  (Read 20052 times)

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kiser02av

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26+ MPG!!!
« on: 11/23/09 10:12 AM »

I did an experiment yesterday during a long drive. At 55 mph with no wind and mostly flat ground (some small hills). I went 111.6 miles off of 4.254 gallons of gas. That is 26.23 MPG!!! I had a light load in the box (suitcase, smalll toolbox, winter survival kit, and a few other small things). This is by far the best I have ever done, by about 7.5 MPG.  The next leg of the trip I bumped it up to 60 MPH. I dropped to about 20 MPG. Then I bumped it up to 75 MPH and got about 15.5. Its amazing what slowing down a little does for mileage. What is the best you guys have gotten? I had never gotten above 19. I have also never driven less than 60 MPH for any amount of time though.
« Last Edit: 11/23/09 10:22 AM by kiser02av »
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Troublemaker

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Re: 26+ MPG!!!
« Reply #1 on: 11/23/09 10:31 AM »

On long trips, I can average 20mpg, and that's at 75-80mph, keeping the rpm just under 2000, and not a lot of start/stop traffic (aka outside of NJ).

Normal city driving, I get about 15.
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avyfanohio

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Re: 26+ MPG!!!
« Reply #2 on: 11/23/09 01:23 PM »

Most of my highway running is at 65-67 mph and I get around that 19mpg.
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kiser02av

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Re: 26+ MPG!!!
« Reply #3 on: 11/23/09 01:40 PM »

At 75-80 I run almost 2500 RPM. What rear end do you have?
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PerfectReign

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Re: 26+ MPG!!!
« Reply #4 on: 11/23/09 04:08 PM »

I would guess teh 3.xx gearing.

I consistently drive at around 70-75 on the highway and am right at 2100-2300 rpm.



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ramonday

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Re: 26+ MPG!!!
« Reply #5 on: 11/23/09 06:56 PM »

I did an experiment yesterday during a long drive. At 55 mph with no wind and mostly flat ground (some small hills). I went 111.6 miles off of 4.254 gallons of gas. That is 26.23 MPG!!! I had a light load in the box (suitcase, smalll toolbox, winter survival kit, and a few other small things). This is by far the best I have ever done, by about 7.5 MPG.  The next leg of the trip I bumped it up to 60 MPH. I dropped to about 20 MPG. Then I bumped it up to 75 MPH and got about 15.5. Its amazing what slowing down a little does for mileage. What is the best you guys have gotten? I had never gotten above 19. I have also never driven less than 60 MPH for any amount of time though.

Hey, 6000lbs is just that. Add enough resistance and the aerodynamics of a brick and watch those mpgs go down. My personal best is right at 23.5mpg, in completely flat parts of Texas going 65mph, no wind, with a crew of three and about 500lbs of luggage. Tires were right at 38psi and are fairly hard (680 treadwear).

I could see 26mpg going 55, no hills, no wind, tires running slightly hard and very little load. The 5.3 is an amazing all around performer. It's made a true believer out of me. Now the stock transmission is another story, but an outstanding engine.
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tritonboulder47

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Re: 26+ MPG!!!
« Reply #6 on: 11/23/09 07:14 PM »

I did 27 once on a trip to NJ and back last summer...  And that was with my 20's and with the AC cranked, going an average of 65-80 MPH...
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Troublemaker

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Re: 26+ MPG!!!
« Reply #7 on: 11/23/09 07:22 PM »

I would guess teh 3.xx gearing.

I consistently drive at around 70-75 on the highway and am right at 2100-2300 rpm.




Yes, I think I have the 3.73 gears.  Whatever came stock on the 2WD 05's  (non-Z66, non-4x4, non-Z71)
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nfhjr

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Re: 26+ MPG!!!
« Reply #8 on: 11/23/09 07:25 PM »

I have been avg. 24.4 mpg at 65mph with my Av. so far, have been watching the mpg. on my scan gauge which plugs into the computer plug under the dash.
Several other people on this form also have scan gauges.
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badtuffstuff

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Re: 26+ MPG!!!
« Reply #9 on: 11/25/09 02:23 PM »

It does not seem to matter how hard or soft I drive Tonka. I get about 12.9 MPG. :laugh:
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thomsen05

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Re: 26+ MPG!!!
« Reply #10 on: 11/25/09 03:26 PM »

It does not seem to matter how hard or soft I drive Tonka. I get about 12.9 MPG. :laugh:




That's the way mine is in town driving.....of course I have a lead foot.    out on the open road I can get about 20mpg @65-70mph     
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badtuffstuff

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Re: 26+ MPG!!!
« Reply #11 on: 11/25/09 03:30 PM »

It does not seem to matter how hard or soft I drive Tonka. I get about 12.9 MPG. :laugh:
Of Cours ethat is what I get with the lift and tires I drive.  :4:
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anglarry04

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Re: 26+ MPG!!!
« Reply #12 on: 11/26/09 07:38 PM »

i can see 27 mpg if I reset the guage while driving and on flat straight road.   hwy I avg 17-18 lately at 70-80mph.   13-14 to and from work.
 In the Tahoe (with displacement on demand), I hit 30 mph at 60mph on a flat straight road for 35 min straight!
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Troublemaker

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Re: 26+ MPG!!!
« Reply #13 on: 11/26/09 08:44 PM »

I've gotten 57+ mpg if I reset while driving!  :4:
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anglarry04

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Re: 26+ MPG!!!
« Reply #14 on: 11/27/09 06:47 AM »

I've gotten 57+ mpg if I reset while driving!  :4:

that too...but I was refering to steady readings... :beating:
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skeptic

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Re: 26+ MPG!!!
« Reply #15 on: 11/30/09 02:38 PM »

The drive back from roughly Las Vegas to Salt Lake City I got a bit over 16 according to the trip computer.  All highway, lots of mountains, speeds typically between 70 and 85 using cruise.  About what I expected, but I was hoping for closer to 20.
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MooseAlanche

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Re: 26+ MPG!!!
« Reply #16 on: 11/30/09 03:31 PM »

The drive back from roughly Las Vegas to Salt Lake City I got a bit over 16 according to the trip computer.  All highway, lots of mountains, speeds typically between 70 and 85 using cruise.  About what I expected, but I was hoping for closer to 20.
Did you reset the DIC prior to the trip. If you didn't you are getting an average MPG from the last time the DIC was reset. So it may actually be better than you think.
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Re: 26+ MPG!!!
« Reply #17 on: 11/30/09 04:01 PM »

By the by - just came back from a trip to Northern California.  Based on both hand and DIC calculations, I got 18.6 (18.5 via the DIC) miles per gallon.

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Troublemaker

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Re: 26+ MPG!!!
« Reply #18 on: 11/30/09 04:33 PM »

By the by - just came back from a trip to Northern California.  Based on both hand and DIC calculations, I got 18.6 (18.5 via the DIC) miles per gallon.



I'm not going there....    :laugh:      :4:
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PerfectReign

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Re: 26+ MPG!!!
« Reply #19 on: 11/30/09 05:27 PM »

I'm not going there....    :laugh:      :4:
Guess I walked into that one!

(I like where your mind is.)
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skeptic

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Re: 26+ MPG!!!
« Reply #20 on: 11/30/09 09:00 PM »

Did you reset the DIC prior to the trip. If you didn't you are getting an average MPG from the last time the DIC was reset. So it may actually be better than you think.
yes, I reset it.  I suspect going from SLC to Vegas (actually Clearfield UT to Bullhead City AZ) or round trip would be slightly better.
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Shriker

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Re: 26+ MPG!!!
« Reply #21 on: 12/16/09 02:39 PM »

Wow....I would kill for some of the numbers you guys are getting.

My 02 Z71 currently has slightly more aggressive tires than the stockers but even when I had street tires and wheels off of a Danali the best I ever saw was 16 or so on the highway and about 13 around town .  Now with the more aggressive tires I am about at 11-12 city  and 15ish highway.  I did seem to do better by one or two with the K&N in (been out for a bit , cleaned it,oiled it and forgot to put her back in , has paper element in now).

Has 104K on her now and probably needs new plugs/wires/belt along with greasing the wheel bearings.  Have had her throw the dreaded codes for knock sensors under the intake a few times as well (setting off the check engine light) so I need to change those out - I am sure that could help , along with cleaning the intake out when its off .
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midlifecrisis

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Re: 26+ MPG!!!
« Reply #22 on: 12/17/09 05:20 AM »

I'm baffled by how anyone is getting mid-20's in MPG, unless they are going downhill the whole time.   :o  The best I ever got, and that was only once, was 18 MPG on a long trip to Indianapolis.  Typically the most I get is 17 MPG, and I average 14 to 15 MPG in mixed driving.  Towing our 5000 lb travel trailer, I get 9-11 MPG.
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bassbuff

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Re: 26+ MPG!!!
« Reply #23 on: 12/17/09 08:11 PM »

I just took two trips totaling about 2400 miles. The first trip was bone stock and averaged 18mpg. I installed a Spectre CAI and E3 plugs before the second trip and didn't see much of an improvement, it went to 19mpg. Performance is better but just not seeing the mileage improvement.
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skeptic

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Re: 26+ MPG!!!
« Reply #24 on: 12/31/09 10:39 AM »

Just got back from a road trip - UT to OR, up to WA, back to OR, over to Eastern OR, then back to UT.  Average for the trip was 17.6mpg.  Lots of different speed limits plus me experimenting with different speeds via cruise control.  I was getting low 20's at 60mph, same stretch at 80mph the mpg drops to around 15.  It makes sense, but I was surprised that 20mph made a difference of 7 or 8 mpg.
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