Looking to squeeze more Mpg?

[Yukon&Tahoe]

What no Prius suggestions

 

[Gzes]

I'd rather drive a volt... Na a fiat 500 would do

 

[redaddiction]

When is the last time you did a tuneup? One of the Tahoes I had saw a significant mpg from 11 up to 18 mpg highway with a fuel filter change, seafoam in the gas tank and some down the intake.

 

[Donnie Yukonie]

Ive been here a while and Ive seen a couple hundred of these fuel mileage threads . I have to know where are you guys coming up with 18,19-20 MPGs ANYWHERE?! that makes no sense to me . I calculated a 1.3 MPG improvement over stock with my blackbear tune , this was done by Driving the SAME exact destinations with the least amount of variables I.E stoplights ,stop signs ect…

the best Ive ever had my truck do was right after a tune up bone stock and I clocked a full tank of gas with all highway mileage from NC to NJ and I got 16.1 mpgs

so even with a blackbear tune at the time of this I still wouldn't touch the 18 mpg mark?
Im no lead foot and know what it takes to make good MPGs . Heck I can make 37 mpgs in my Chevy Cruz

Check out this link guys this will show you the averages

http://www.fuelly.com/car/gmc/yukon

 

[La rabona]

Just buy a cash car, I bought me a vw cabrio 30mpg average i cant go wrong ...big difference 30 dlls tank vs 90 dlls I only drive my tahoe like once a month .......

 

[Stang&Hoe]

these other guys are dead on. best ive seen in mine (z71 with 285s.) was 13mpg. average is about 9 to 11. you would be shocked at how much those 285s are killing you since im willing to bet you didnt regear for them...like i didnt. step back down to factory tires, shed some weight in the truck and keep the RPM under 2000. MAYBE 15-16 if youre lucky.

now another option would be instead of getting a honda or something like that, an old surplus crown vic. i know Georgia State Patrol is selling off their old ones CHEAP!! they just sold an 07 will 103k miles for 1300 bucks. i got 24-26 out of mine before the heavy mods. it still gets 18-22. big comfy and safe car too...
then like another said park the yuk and take the insurance off of it.

i know if money was an issue for me, the copenhagen would have to go. really got to weigh your vices and pleasures against your education. there will be plenty of time for fun and toys later, but this is your one chance at education brother, dont waste it!! worst comes to worst, sell the yuk, buy a nice fuel saver then when youre back on your feet good, shop around and get you a nice hoe already cummins swapped!

 

[livingez_123]

I thought I was the only one who thought about doing a cunnins swap. I would take 04.5-06 Common Rail 5.9 and there new 6 spd auto. it will fit fine and even the ac compressor is in the right place. Run a Smarty tuner and get 22+ all day long for hwy miles. plus as a added bonus you will end up with 700-800 ft lbs of torque. The new 6.7 cummins is 350 hp and 850 ft lbs of tq. you would have one towing beast.


=

 

[b4z]

This is really something my wife and I are struggling with. The tahoe and my GTO have been paid off for 16 months and it is the first time I haven't had a car payment n 14 years. It is amazing. But 13 mpg city and 16 ish hwy is driving me nuts.
If I am pulling down from 80mph I can get it into the 18-19 mpg but70 mph adds 30 minutes to the trip to our mountain house. A trip that costs us $100 in gas.
I am currently searching for 18" hybrid wheels. I know we will pick up 1 mpg in the city just from those.
An '07 and up is much more aerodynamic but weighs 4-500 lbs more. So we are not sure which way to go. But we have to have an SUV along with our other cars.

---------- Post added at 08:28 AM ---------- Previous post was at 08:26 AM ----------

I can also pick up 1 mpg from using ethanol free gas, but that is $4 plus per gallon.

 

[CHOO CHOO]

Yeahhh, i only get 16-17mpg at best conditions and thats right after a tune up, oil change, clean filter, and clean spark plugs. I have a cai, a borla exhaust and a bbtune. The bbtune helped the most honestly. I went from 12-13 hwy to 15-16 hwy after the tune. But i have 24's and a lead foot sooo i f'd.

B4z has it. You really cant do much more....

#attentionwhore

 

[Dowsewashere]

I get 13 and change. Sometimes 10 when i wheel or when i want to hear my glasspacks scream. I cannot see anyway of getting better gas mileage. Plus dont people understand these are 5000+ lb suvs with v8s.

 

[04SS99Denali]

when i had both my OBS trucks i would usually calculate about 10-12 average per tank. if your concerned about mpgs i think your in the wrong truck lol

 

[McFizzl]

Forgot all about this post. Havent had engine light in forever. Still have my jerking at highway speed but Im considering just redoing my suspension maybe with the 6 inch RCX lift that replaces a lot of the worn ball joints and bushings and some new tires. Id rather get 15mpg and look like a badass than buy some junker that may crap out in a few months. Buying a 500-650 bike isnt thrown out yet either.

 

[b4z]

I think When GM was designing the GMT900s to replace the 800s there were design decisions they HAD to make because the trucks weigh 4-500 lbs more.
The swept back windshield, the lower headroom, leaned back front end, AFM, standard 3.08s (and try finding a 3.45 geared truck in dealer stock)are all there to get the hwy number up to where the public can stomach it.
Think what they would have gotten with GMT800 aero and without all those features and with an extra 500 lbs?

 

[b4z]

Been doing weekly drives from Charleston, sc to Hendersonville, nc. about 500 miles once driving to home improvement stores is figured in. I usually leave Charleston around
7 and and am back home before 7pm.
This fuel economy is getting to me. 16.3mpg. I figured if I had a vehicle that got 25mpg I would save $28 per trip. $112 a month savings.
But its not worth me buying or leasing another vehicle to get that mileage.
And if I had bought a vehicle that got a lot better mileage it wouldn't have the capabilities nor the comfort of the Tahoe.
if I slow down to get better mileage then I add an hour to the trip. Sucks.

 

[dudeface]

lucas fuel injector cleaner and stabilizer.............15 bucks at walmart for enough to add to 10 tanks of fuel. I use 4 oz per full tank..........113 liters canada measurements.

will give you 60 or more extra miles per gas tank right off the bat. after a while it will clean out your system totally and then who knows???

I use it every time i get a tank.

peace

 

[KPOD]

lucas fuel injector cleaner and stabilizer.............15 bucks at walmart for enough to add to 10 tanks of fuel. I use 4 oz per full tank..........113 liters canada measurements.

will give you 60 or more extra miles per gas tank right off the bat. after a while it will clean out your system totally and then who knows???

I use it every time i get a tank.

peace

Whose leg are you trying to pull?

 

[dudeface]

Whose leg are you trying to pull?

the first time i put it in a full 113 litre tank i got 100 kilometers more. I always record my gas milage every tank................i was averaging 550 to 560 kilometeres a tank. after about 6 months of recording my milage, I tried lucas fist time ...........670 k. i can squeeze up to 720 k out of a tank..........

I live in rural city canada..........traffic is a little better than most cities. but on the highway i get 800+ k per tank. now granted this is not leadfoot driving..........or grampa driving either, just sensible use of the road driving.
my tahoe has the 5.7 vortec.......i am the third owner and it was a government forest registry vehicle out of canmore canada...........mountain roads population 12,288. vehicle was over maintained and currently has 323,683...................................

peace

 

[MC153]

Whose leg are you trying to pull?

Yeah isn't that like getting an extra 5 mpg. I get a little better gas mileage with Lucas but that much just seems ridiculous.

 

[SunlitComet]

Still paying more for the increase.