Gryphon avg mpg vs lariat message center's

[bossman15]

Haha that makes me more sad lol. So how would I go ablut finding this "error" to subtract from the gryphons?

[88Racing]

I just tune out those displays and use a pencil and calculator along with a log book.

[shotgun]

Originally Posted by 88Racing

I just tune out those displays and use a pencil and calculator along with a log book.

This is the one that I use: http://www.vertex42.com/Links/go.php...le-mileagecalc

I modified it slightly (added columns for the truck computer value, error/difference, brand and location, and comments):

[88Racing]

Originally Posted by shotgun

This is the one that I use: http://www.vertex42.com/Links/go.php...le-mileagecalc

I modified it slightly (added columns for the truck computer value, error/difference, brand and location, and comments):

That looks like a great tool to use!

There is also a couple of web sites that will host your info also. Kind of like a bulletin board. The only things about them is they make your figures public and you have to enter the figures they want.

[Jackpine]

Originally Posted by bossman15

Haha that makes me more sad lol. So how would I go ablut finding this "error" to subtract from the gryphons?

I was thinking of something simple, like the Gryphon says 15.5, but you calculate 14.7. You need to subtract 0.8 from the Gryphon to get your real mileage. Just keep track of the difference over a few tankfuls and I suspect you'll find it's fairly constant.

- Jack

[88Racing]

In the long run the message center is more consistant than the gryphon.
The message center varies .1-.3
The gryphon varies .5-1.5

[PZX_2002]

Here is a test that I have done time and time again so this is accurate on my truck.
These are the readings I logged with the canned Gryph 87 tow tune:
message center = 12.0 mpg's
Gryphon = 14.5mpg's

So when it states 12.0mpg's it is really 10.7 using "good-o'l-fashion" tools, pen n paper. The message center on my pickup is off by -1.3 mpg's and as for the gryphon, I could not count that high.



2007 F150 SCrew
stock 4x4

[06FX41992]

Originally Posted by PZX_2002

Here is a test that I have done time and time again so this is accurate on my truck.
These are the readings I logged with the canned Gryph 87 tow tune:
message center = 12.0 mpg's
Gryphon = 14.5mpg's

So when it states 12.0mpg's it is really 10.7 using "good-o'l-fashion" tools, pen n paper. The message center on my pickup is off by -1.3 mpg's and as for the gryphon, I could not count that high.



2007 F150 SCrew
stock 4x4

Thats how it is for me too, only I don't have the message center readout. My Gryphon is reading 12.5-13.5 and when I do it by hand I get around 9.5-10.5. Its kinda frustrating, but most of the frustration is from the gas mileage itself. I guess 35 inch tires and a steel replacement bumper might have something to do it... Oh, ya, and a heavy right foot...

[Power Hungry]

One of the problems is that when the calculations for economy were written, it was for straight gasoline. Now with 10% ethanol blends being more prevalent, this changes things considerably as far as MPG predictions go but the algorithms have never been updated. The readings used to be considerably more accurate a few years back. I guess I'll have to revisit them and make some adjustments.

[Jackpine]

Originally Posted by Power Hungry

One of the problems is that when the calculations for economy were written, it was for straight gasoline. Now with 10% ethanol blends being more prevalent, this changes things considerably as far as MPG predictions go but the algorithms have never been updated. The readings used to be considerably more accurate a few years back. I guess I'll have to revisit them and make some adjustments.

Now THAT makes sense to me! Thanks, Bill.

- Jack