Fuel Economy upgrades for 2004 Trailblazer I6 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 5.3L V8 Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Performance Engine Tuning/Engine Modifications

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  #1  
Old 04-19-2011, 09:53 PM
ibadmofo ibadmofo is offline
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2004 Chevy TrailBlazer LS
Sand Beige Metallic 4.2L I6 2WD
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Fuel Economy upgrades for 2004 Trailblazer I6

Trying to get some ideas on how to go about getting better gas milage out of my Trialblazer. I currently get 17.5 mpg and with the awesome gas prices it is like $55 to $75 per week in fuel. I see that the Air Raid Throttle Body Spacer is a waste. Thinking of starting with the air systems first before moving to the Engine and Transmission mods.
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  #2  
Old 04-19-2011, 11:00 PM
kermits8 kermits8 is offline
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2003 Chevy TrailBlazer LS
Emerald Jewel Metallic 4.2L I6 4X4
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Wow, that is an original idea. I wish we would have thought about that. There are numerous threads on that very subject. If 1 or 2 mpg will make or break you, you have much bigger problems than the mpg. Sorry for being harsh.
Dave
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  #3  
Old 04-19-2011, 11:53 PM
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concrete concrete is offline
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2005 Chevy TrailBlazer LT
Black 4.2L I6 4X4
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Quote:
Originally Posted by ibadmofo View Post
I currently get 17.5 mpg and with the awesome gas prices it is like $55 to $75 per week in fuel.
I wish I had that problem, I've changed plugs, air filter, cleaned the throttle body, ran 2 bottles of techron and I get 14.5 mpg. Better than the 12mpg I was getting I guess. If your getting 17.5 with a TB and whining about it maybe you should get a 4 cyl.
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  #4  
Old 04-20-2011, 12:11 AM
Loverotties Loverotties is offline
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2002 Chevy TrailBlazer LTZ
Majestic Red Metallic 4.2L I6 4X4
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Tell us what you did so far,like new plugs,thermostat,O2 etc.
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  #5  
Old 04-20-2011, 10:06 AM
Doc Brown Doc Brown is offline
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2003 Chevy TrailBlazer LT EXT
Dark Green Metallic 4.2L I6 4X4
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Changing driving habits and a tune are about the best things you can do. The rest will gain you a little, but that's all, a little. Even at best, most members including myself get about 21 on straight freeway driving. I'd say you're doing pretty good right now.

As far as driving habits, I know that comparing my driving habits to yours is apples to oranges, but I don't let mine go above 2500 RPMs when taking off from a stop light, unless I'm getting on the freeway. I also keep it below 70 whenever practical. Now that winter's almost over , my mileage is going up to 15 mixed freeway/city. Once it warms up, it'll be back to 17 mixed freeway/city. That's without a tune, and driving like the old man that I'm becoming.

The plus for me is driving the HHR most of the week, which averages 27 in mixed driving. So between the 2 vehicles we use 20 - 25 gallons a week. Seriously, if this is an issue for you, and unless you need a large SUV to tow or for other reasons, you might want to think about a smaller car. For most of us here, we knew going into it that it was going to be an expensive vehicle to drive.
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  #6  
Old 04-20-2011, 01:32 PM
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palafoja palafoja is offline
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2003 Chevy TrailBlazer LT EXT
Dark spiral gray 4.2L I6 4X4
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Location: Stickney, il.
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Quote:
Originally Posted by ibadmofo View Post
Trying to get some ideas on how to go about getting better gas milage out of my Trialblazer. I currently get 17.5 mpg and with the awesome gas prices it is like $55 to $75 per week in fuel. I see that the Air Raid Throttle Body Spacer is a waste. Thinking of starting with the air systems first before moving to the Engine and Transmission mods.
WOW!!!! 17.5MPG

I do most of my driving in the city in stop and go traffic and I get (TOPS)14.8-15, but most of the tiem i'm in the 13's and I go as low as 11.9.


the only time i've seen it going up to 20MPG was when I took a 6 hr. drive, I was so exited about it.

17.5 is great, Just think about me when you look at you 17.5 and you fell much better

on a site note, my wife drives an 02 chrysler minivan with the 3.8l V6 and she drives mostly on hwy, she get 19-21.5 MPG
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  #7  
Old 04-20-2011, 01:34 PM
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palafoja palafoja is offline
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2003 Chevy TrailBlazer LT EXT
Dark spiral gray 4.2L I6 4X4
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BTW new plugs coming soon, maybe next oil change at 96K and I hope MPG'S improve a little
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  #8  
Old 04-20-2011, 07:38 PM
sLAsh sLAsh is offline
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2005 GMC Envoy SLT XL
Liquid Silver Metallic 4.2L I6 4X4
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The voy is my wifes and gets her between 10 & 12 mpg going to work and back but she only has a 5 or 10 minute drive so it's not bad. I drive about 45 minutes each way so I had to get something that got better mileage(cobalt SS supercharged) between the two of them it works out pretty good. We need a truck of some sort to tow our trailer and most of them get the same or worse milage than the 'voy so we are ok with it.
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  #9  
Old 09-22-2011, 02:38 PM
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Pongo Pongo is offline
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Good advice to try and keep the RPMs at or below 2500. On the highway this means I don't go over 100 kph (=60 mph).

We drive our En-Goat like old people (it's hard...man there's alot of power and accelerat-goat in this truck).

We've been getting about 23.5 mpg, and I think that's awesome.
Around town it can drop to 16 mpg.

Only things I've done to it are that I run sythetic oil, and I've got one of those contentious K&N Filt-Goats.
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  #10  
Old 09-23-2011, 06:35 PM
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RayVoy RayVoy is offline
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Quote:
Originally Posted by Pongo View Post
Only things I've done to it are that I run sythetic oil, and I've got one of those contentious K&N Filt-Goats.
Tires (and/or your left foot ) will kill the mileage.
Snow tires, off road, any aggressive thread pattern will impact the mpg.

Use a good touring tire and add a little extra air, an easy 2 - 4 mpg (along with the above info).
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