GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

vortec max MPG? And more ?

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Old Feb 14, 2009 | 12:13 AM
  #11  
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sorry I meant to say im NOT doing a gear swap.
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Old Feb 14, 2009 | 09:48 AM
  #12  
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Originally Posted by VMaxAZ
I have a 2WD VMax, and I got about 12-14 in town and about 17-19 on the highway.
My truck has 3.73's.
Originally Posted by VMaxAZ
Now, with the supercharger....If I stay out of boost on the highway, I get about 2 more mpg and lose about 1mpg in town.
you beat me too it.....

We get the same in our VMAX, and the magic is all in the manifold and supercharger
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Old Feb 14, 2009 | 06:47 PM
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Originally Posted by GMCtrk
Dont go any less than 4.10, that's just my opinion after having changed from 3.42 to 4.10. Mileage with 6.0 and 3.42s = 12.8 average. First calculated tank on the 4.10s = 14.5 mpg! And trust me, I got on it a couple times too Im very happy.
I'm not following how this is actually gonna work? But if it does it sure sounds like justification for a go fast part to me!
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Old Feb 14, 2009 | 06:49 PM
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Originally Posted by agreif
I'm not following how this is actually gonna work? But if it does it sure sounds like justification for a go fast part to me!
I drive almost exclusively all city. I think it just requires a lot less pedal to get up and go than it did with the 3.42s. Also the engine doesn't lug around like it did with the 3.42s in 4th around 40mph
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Old Feb 14, 2009 | 06:55 PM
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That's what I thought you might say. I can buy that. That's how I convinced myself the 6.0 would be better than the 4.8 too.
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Old Feb 14, 2009 | 06:58 PM
  #16  
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no joke either in my experience the 6.0 gets better highway gas mileage than the 4.8. I've never had the 6.0 kick down to 3rd on the highway going up a hill whereas the 4.8 would have to kick down all the time, even unloaded.
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Old Feb 14, 2009 | 09:18 PM
  #17  
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well nvm on this idea, the dealer sold it out from under me! Sold it after I said on the phone I wanted it, glad I called them one more time for a question about something completely off the wall before I drove 2 1/2 hours.
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