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RE: MPG

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RE: MPG - 7/17/2007 12:19:26 PM   
drtuba

 

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I dont know how you guys get over 30MPG, I drive conservatively and over the elast 8 tanks Ive averaged 20MPG. The best I can ever get is around 27MPG according to the trip computer if I set the cruise at 60 and never have any stops. If I have any full throttle starts the milage drops. Here is the data I have collected from my last 8 tanks of gas.




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Attachment (1)

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Post #: 41
RE: MPG - 7/17/2007 12:55:33 PM   
Sancho805


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yeah, 30 mpg seems too much. i drove down to san diego from long beach this past weekend with clear traffic and the best i could get was 27.4 mpg based on the computer display. i reset it when i reached highway speed on the freeway and looked at it before i exited. my mph average was about 73. what am i doing wrong? 

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Post #: 42
RE: MPG - 7/17/2007 1:09:15 PM   
dotsonian


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quote:

ORIGINAL: drtuba


I dont know how you guys get over 30MPG, I drive conservatively and over the elast 8 tanks Ive averaged 20MPG. The best I can ever get is around 27MPG according to the trip computer if I set the cruise at 60 and never have any stops. If I have any full throttle starts the milage drops. Here is the data I have collected from my last 8 tanks of gas.




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Did you happen to notice how many gallons the car said you used on any of the tanks?
For me it is usually with in a 1-2 tenths of a gallon of what I put in, but I do not check it every time.

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Post #: 43
RE: MPG - 7/17/2007 1:56:38 PM   
drtuba

 

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nah, I dont usually check the gallons used portion on the computer. I did just do an average error for the MPG calculated VS MPG computer and over the 8 tanks its at .2 MPG

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Post #: 44
RE: MPG - 7/17/2007 5:51:04 PM   
SOHCman


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quote:

ORIGINAL: drtuba
I dont know how you guys get over 30MPG, I drive conservatively and over the elast 8 tanks Ive averaged 20MPG. The best I can ever get is around 27MPG according to the trip computer if I set the cruise at 60 and never have any stops.


OK,

You mentioned setting "cruise at 60"...

Cruise Control is a HUGE waster of fuel. I never use it unless my legs are tired.

How does cruise control work?

1. If you are on a level surface, your engine will run at a constant speed. The engine burning fuel every second. The car will never "coast" and expend less fuel.

2. Going uphill? The computer will, depending on the steepness of the grade, push the throttle harder, and if the speed response is not quick enough, the transmission will downshift as the computer gets you "back to speed", then immediately back off the throttle... THIS WASTES A HUGE AMOUNT OF FUEL!

3. Going downhill? The computer will actually DECELLERATE your car to keep a steady speed. This wastes any momentum your car already has built up! And of course, wastes gas...

OK, quick recap:

1. Wastes fuel...
2. Wastes fuel...
3. Wastes fuel...

So, if you want good mileage... turn OFF cruise control.

Allow your pony to coast down hills... Some hills around here allow me to coast from 65 to 90... trip computer loves that! Neat to see Average MPG climbing... 35...37... 40... 42... Coast at 95 and you can even peg it at 99.9 MPG...

Accelerate faster than the speed limit before you get to a large hill then keep your pedal steady... you will lose speed back to the speed limit (or a little under)... no big deal, you will gain it back at the crest of the hill... AND you will be able to back off the throttle...

That's how we get good mileage, and have fun driving our Mustangs.

Try it and let us know if your mileage improves.

SOHC

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Post #: 45
RE: MPG - 7/17/2007 10:18:51 PM   
Damon007

 

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I am going to run some Marvel Mystery Oil in with my Premium Octane on my next trip, I am shooting for 30 mpg.

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Post #: 46
RE: MPG - 7/18/2007 2:56:47 AM   
Derek245


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Ive found that one of the biggest helps is when having a stop, if i can coast up to it rather than brake for as long as I can (without aggravating any drivers behind me). Ive also noticed that it seems to get the best mileage between 50-65. Any faster and its tough to get over 30

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Post #: 47
RE: MPG - 7/18/2007 9:24:29 AM   
dotsonian


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quote:

ORIGINAL: drtuba

nah, I dont usually check the gallons used portion on the computer. I did just do an average error for the MPG calculated VS MPG computer and over the 8 tanks its at .2 MPG


The reason I asked was, that is probably the real difference between your calculation and the computer's.
I assume, you are using how much fuel you put in the tank, but the computer is using how much fuel it put in the engine. 

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Post #: 48
RE: MPG - 7/18/2007 6:22:26 PM   
Damon007

 

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I checked again tonight just for kicks and I am getting 25 around town using the Marvel Mystery Oil mixed in with my gas.

I know I am going to get 30 on a trip.

I am very please with my mpg. I was driving a toyota tacoma truck that everyone thinks is so good on gas but I get 2-3 mpg better than that truck.




< Message edited by Damon007 -- 7/18/2007 6:24:32 PM >


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Post #: 49
RE: MPG - 7/19/2007 4:33:10 AM   
drtuba

 

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Assuming the computer is accurate then the amount of gas I put in the tank should be the same as the amount going into the engine. This of course is over time, not just one fill up. I just got tuned by Justin at VMP tuning last night so Ill make sure to report back and MPG changes after my next several tanks.

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Post #: 50
RE: MPG - 7/19/2007 6:55:52 AM   
dotsonian


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I agree, but also add that if the computer is accurate and over time fillup gas = computer gas then over time your mpg = computer mpg.

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Post #: 51
RE: MPG - 7/19/2007 8:30:02 AM   
drtuba

 

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it is really close over time, the average error is less then .2MPG So far Ive burned 1/2 a tank on my new tune and I dont want to draw an conclusions until I average over several tanks, but Im averaging better then my best take on my chart I posted. Im at 26MPG so far.

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Post #: 52
RE: MPG - 7/19/2007 9:21:41 AM   
harleystang

 

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I'm getting around 25...that's combined mountain (up to 8000 plus feet and down again) and in town driving. It has been as high as 31 (down the mountain and to and from Palm Springs on the freeway...I'm cool with that...

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Post #: 53
RE: MPG - 7/19/2007 8:57:50 PM   
06BlackStang

 

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I do alot of highway driving on my way to work and I'm getting about 24-25

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