void warranty??
Senior Member
Joined: Sep 2009
Posts: 3,031
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From: The Shenandoah Valley
X2!
You can do a few things to help mileage, but that right there is the biggest MPG improving mod in most cases.
People often "think" they know or have good mileage habits, but often they have no feed back and depend on old habits. I know a guy with a simular truck to mine who is always complaining about mileage, but if you watch him drive ... easy to see why. He will argue that it takes the same fuel to accelerate to road speed if you get on it and go as if you take it easy.
Best training aid is either a vacume gauge ..... or a ScanGageII with both instand MPG and average MPG displayed on one side. Drive to maximise the instant MPG, and pretty soon you'll see your habits change a little, it becomes almost like a video game running while you drive, you start anticipating slow downs and stops and hills, and soon you'll see that Average come up on the same route.
It's not black art, it's simply a function of speed and fuel flow. 60 MPH and a 3 GPH flow at an instant is 20 MPG at that instant. Lightly step on it, GPH goes up, MPG drops, and it averages it over time.
You'll quickly see the changes in that AVG number brought on by "listening to those pipes".
On my '07 5.4 and my cars ('95 Tbird, '01 Merc, & wife's Forester) I find the SGII to be very close, within a few tenths and always within 1/2 mpg of what the math shows from fill up to fill up. I can account for variations as sometimes I get her more full than others or the slope is different, and on longer road trips the SGII is usually almost exactly same as math. I've used it nearly two years now and put it whatever I drive along with the XM.
You can fine tune it to the tank size and it'll do that "miles to empty" deal.
You can do a few things to help mileage, but that right there is the biggest MPG improving mod in most cases.
People often "think" they know or have good mileage habits, but often they have no feed back and depend on old habits. I know a guy with a simular truck to mine who is always complaining about mileage, but if you watch him drive ... easy to see why. He will argue that it takes the same fuel to accelerate to road speed if you get on it and go as if you take it easy.
Best training aid is either a vacume gauge ..... or a ScanGageII with both instand MPG and average MPG displayed on one side. Drive to maximise the instant MPG, and pretty soon you'll see your habits change a little, it becomes almost like a video game running while you drive, you start anticipating slow downs and stops and hills, and soon you'll see that Average come up on the same route.
It's not black art, it's simply a function of speed and fuel flow. 60 MPH and a 3 GPH flow at an instant is 20 MPG at that instant. Lightly step on it, GPH goes up, MPG drops, and it averages it over time.
You'll quickly see the changes in that AVG number brought on by "listening to those pipes".
On my '07 5.4 and my cars ('95 Tbird, '01 Merc, & wife's Forester) I find the SGII to be very close, within a few tenths and always within 1/2 mpg of what the math shows from fill up to fill up. I can account for variations as sometimes I get her more full than others or the slope is different, and on longer road trips the SGII is usually almost exactly same as math. I've used it nearly two years now and put it whatever I drive along with the XM.
You can fine tune it to the tank size and it'll do that "miles to empty" deal.
Senior Member
Joined: Sep 2009
Posts: 3,031
Likes: 45
From: The Shenandoah Valley
That works .... it'll create some mileage making habits that you'll find yourself doing without even thinking about it.
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Senior Member
Joined: Sep 2009
Posts: 3,031
Likes: 45
From: The Shenandoah Valley
I some cases, maybe yes .... in some cases, maybe not so much.
Depends on what other mods, if any and what the owner wants out of it versus what s/he wants to invest in $$$ ... and in many cases, "time" spent waiting.
Depends on what other mods, if any and what the owner wants out of it versus what s/he wants to invest in $$$ ... and in many cases, "time" spent waiting.