How aacurate is your Edge CTS

[NC-Excursion]

I have a CTS that I run for gauges. I recently started monitoring the avg mpg feature and I am getting some surprising numbers. My 6.0 has a few things done but nothing super special and the CTS is saying I'm getting 26-27.5 MPG runni g at 60-65 on the way home. I haven't had a chance to do the math as I haven't filled up the whole tank in a while since these damn gas stations won't let you run more than $75 at a time. Anyone out there have any experience with the accuracy of these gauges.

Thanks,

John

[NC-Excursion]

No one has any input?

[Tuscany]

I highly doubt your getting 26.5-27.5 mpg. Probably closer to 20 maybe 23 tops.

[onebadcoastie]

My input would be swipe your card twice at the pump and top your tank off so you can get an accurate number. I know my dashboard factory MPG numbers are usually dead on with hand calculations. How does the CTS compare with the dash readings?

[van-boy]

i havent used my cts for that but my dash is just about perfect reading 9 mpg, and hand calculating to confirm. if i were you i would just go with the 26-27 and just let sleeping dogs lie. much better than 9 IMO.

bailey

[Erwin8r]

Originally Posted by van-boy

i havent used my cts for that but my dash is just about perfect reading 9 mpg, and hand calculating to confirm. if i were you i would just go with the 26-27 and just let sleeping dogs lie. much better than 9 IMO.

bailey

9 MPG???!? Something's not right...

[ODAWG714]

Originally Posted by Erwin8r

9 MPG???!? Something's not right...

I get 14mpg and that's wot everywhere or even babying it. 9 is not right at all

[ODAWG714]

If you have a ficm tuner your edge cts will lie like crazy. Hand calculate miles driven on a topped off tank waste some fuel and re top and divide and you will get your mpg

[HeavyAssault]

Ex has 44 gal tank right??....with 3/4 left you should have north of 200 miles driven...1/2 tank should be around 400+....What are your findings?

[Power Hungry]

My CTS is about as accurate at calculating MPG as sticking my finger in the air to measure wind speed. In the case of "best guess", it doesn't even qualify as a bad best guess. Basically worthless. I only use the sensor data from my CTS. Those are extremely accurate. I use a pad & pencil to calculate fuel economy.