Is this true? (Instantaneous MPG higher at 60-65 versus 50-55 using DWL)

[SilverCrown9701]

Originally Posted by 2000mc

So, you say your car seems to get better mileage when going downhill?

No I never stated this as fact. I merely stated that by observation of the gauge itself that it shows my vehicle's mileage increases going downhill either coasting or with light engine load. It may be incorrect, but this is just what I have been observing for the past month.

[SilverCrown9701]

Originally Posted by Old Tele man

...that's *WHY* I prefer to continuously collect data (via computer) so that it can be subsequently filtered and analyzed to account for "out-lier" data points (single item) and periods/trends (climbing hill; coasting downhill; etc.).

Now that is wise! May I ask exactly how you track this information separately? I ask because the UltraGauge does not keep a logbook sort of speak or have cycles to watch. Everything is reset to zero once the engine shuts off with the exception of the Average MPG gauge.

[gone-ot]

Originally Posted by SilverCrown9701

May I ask exactly how you track this information separately?

...using ElmScan-5 compact OBDII-to-USB interface cable, plugged into USB-port of ACER tablet CPU, and running OBDwiz software program. I then transfer the captured data onto a USB thumbdrive for transfer to 'big' desktop CPU for display, analyses, and "number-crunching."

Here is link to manufacturer, but I got mine thru Amazon for same price:

http://www.scantool.net/elmscan5-compact.html

[2000mc]

Originally Posted by SilverCrown9701

No I never stated this as fact. I merely stated that by observation of the gauge itself that it shows my vehicle's mileage increases going downhill either coasting or with light engine load. It may be incorrect, but this is just what I have been observing for the past month.

Your car should most definitely get significantly better mileage going down hill, or when coasting / light load.
This would also be why you can see a higher mpg at a higher speed when coasting. When coasting your car will only consume engough fuel to keep the engine spinning with no load, at that relatively fixed rate of fuel consuption, if your car happens to be moving at 80mph while coasting, your instant mpg would probably be near double that of coasting at 40mph

[Xist]

Old Teleman, do you use something like this with your Elmscan and laptop?

http://www.amazon.com/AutoExec-Wheel...dp/B00E1D1GY6#

[SilverCrown9701]

Originally Posted by 2000mc

Your car should most definitely get significantly better mileage going down hill, or when coasting / light load.
This would also be why you can see a higher mpg at a higher speed when coasting. When coasting your car will only consume engough fuel to keep the engine spinning with no load, at that relatively fixed rate of fuel consuption, if your car happens to be moving at 80mph while coasting, your instant mpg would probably be near double that of coasting at 40mph

I completely agree! DWL has certainly been useful.

What I don't like is having to use slightly more throttle to keep myself in top gear on relatively flat terrain with little to no wind.

Anything below 16 TPS and I start to slow down. It's truly aggravating.

Did you happen to see what I said about using cruise control?

[dirtydave]

do a 65-45MPH Pulse and glide. and accelerate quickly for the pulse.

[SilverCrown9701]

Originally Posted by dirtydave

do a 65-45MPH Pulse and glide. and accelerate quickly for the pulse.

I can pulse and glide in an automatic and still come out on top?