Scan gauge schooling

[wdb]

I gave up trying to get accurate trip mileages from the SG. Better to set it, forget it, and use the numbers as relative values.

Truth be told, all I use my SG for these days is intake air temp and clearing the occasional code on my STi. I should probably sell it and use the money to get something truly useful to me.

[Syco54645]

Originally Posted by pb and h

You are correct to some extent but I guess I didn't ask the right questions. Take into consideration the SGII readings vs. the odometer readings. Lets take a closer look:

- My last 2 fills have not been adjusted( SGII has not been messed with)
- Notice the miles driven are off by 1.0% and -0.1%(SGII compared to the odemeter, that is) respectively.
- The 1/7/09 date has the mpg dead on but the mileage and gallons used are off.
- The 1/13/09 date has less variation in the mileage
- The 1/13/09 has increased variation in the gallons

I think we have concluded that the gallons used is subjective due to pump and fill errors but not the mileage. The SGII doesn't seem to be consistant with mileage therefore one will never get an accurate representation of the info, precise(referring to mpg) only by chance as my data shows(1/7/09). I am about ready to sell the damn thing Hell, I didn't need one before and now that I have it, it is irritating me more that helping me.

set your speed to be correct then you will get correct milage. mine has been spot on once i set the speed.

[pcs0snq]

Shawn,
My miles are always within 1.5% error except when I did FAS using the KEY. I suspect you new tires may be the issue. Just adjust the miles. An independent tweak of fuel for sure!

As far as gal's and how you drive. Remember my findings. small to no error with normal driving 13% correction needed with lots of P&G. So in between, with the cruse has no hope of a repeatable error as long as you change your style from tank to tank.

[pb and h]

Are you saying I need to adjust the correction factor from tank to tank?

I figured If I didn't adjust that it should read the same or rather accurate. I have adjusted for my mph. I will see what this tank's error is. It looks like I am on the way to a 45mpg tank

[pcs0snq]

Originally Posted by pb and h

Are you saying I need to adjust the correction factor from tank to tank?

YES
If you drive different from tank to tank. That bad news is if you want a good reading as you run that tank you have to set it up for that style and stay with it. Try it.

0 correction for no advanced Hypermilling
13 for advanced stuff

[WYSIWYG]

Has anyone thought of changing the gallons to Liters. Since the SG can only do whole units. This could be the problem. We can't adjust the 10.8 gallons properly. So it could be concluded that using the 44 Liters, the manual states, would be a better indicator. The only issue with this is you have to convert Liters to Gallons.

My SG usually reads 34.8MPG (with no correction), I know this to be off from my manual calculations. After being frustrated with the % correction on the SG, I decided to try this method. So far in my first tank using the Miles per Liter I am getting an average of 9.8.

1 Gallon = 3.7854118 Liters

9.8 x 3.7854118 = 37.097 MPG

Although I haven't finished the tank (infact I haven't even gone a 1/4 tank yet), this is closer to the actual MPG I calculate every fill up.

Another added bonus to this method is that the Miles till Empty is accurate.

Just my 2 cents.

[Syco54645]

that sucks taht it can only do whole units. wonder if they will fix that with an update...

[pcs0snq]

Not sure the big deal to the point of messing with the eng units. It just effects the Tank Trip for miles/gals till empty. That's it.

Just set it for 10 and be done.

[pb and h]

I am thinking of selling my SGII for $130 shipped since I only had it for 2.5months. I don't really need it and it is more of an instant gratification that I achieved XXmpg for the trip.

[Shaggs2Dope]

Where is the best place to buy a scangaugeII? Are there any places that have em cheaper or free shipping or anything. Not tryin to waste $$, and I really wanna get one so my girl can work on not driving like a crazy person. When you see higher MPG it means money in your pocket, even with gas cheap(for now)

[Scratch&Dent]

The places I know of that sell them are scangauge.com ($170), thinkgeek.com ($160), cleanmpg.com on the left side of the page ($160), and JCWhitney.com ($160). You may be able to find a deal in the FitFreak classifieds.

[CBX]

I bought mine from Amazon.com, and ordered a second cable for around $12. Shipping was free, and when it arrived, there was a free extra cable included, so I have three cables now!

[Contrabida Face]

i just ordered the scangauge ll.
i'm by far not a hypermiler but i like the fact that i get to see my mpg and also troubleshoot if check engine lights turn on.
i hope it suppresses me from driving like a jackass.