Koz:
The range estimate is not a gauge. If it were then the discussion would be different.  

Ok. I can’t do nomenclature and you can’t do math. I guess that makes us even.

I’ve waded through all the sophistry (sure seems like the right word) I can take.

Good day.

carcus1: You took up 4 paragraphs to say: “The gauges are inaccurate and can’t be trusted. The Volt’s real world AER must be 40 because GM says so.”(You are now introducing argument # 3 [Volt's gauges are inaccurate].)/ I already plainly posted that my contention (based on the screenshots and simple mathematical interpolations) has the Volt’s computer giving a real world AER (on that day, under those conditions) with a full battery at close to 26 miles. Based on the screenshots you CANNOT logically determine that rounding error has the computer estimating a full battery AER of 25 to 45 miles. We’ve got too much data for this.// I am NOT countering your argument # 2 [harsh driving has produced greatly reduced AER]. (I’ve got nothing to go on, neither do you)/// I am NOT countering your argument # 3 [Volt's gauges are inaccurate]. (I’ve got nothing to go on, neither do you)So, …….. I’m in agreement with you when you say:“You[r] whole argument hinges on the accuracy of these computer generated range estimates…..”YES!! Correct! Everything I’ve been talking about is based on the Volt’s gauges being accurate!  (Quote)

The range estimate is not a gauge. If it were then the discussion would be different.

carcus1: You took up 4 paragraphs to say: “The gauges are inaccurate and can’t be trusted. The Volt’s real world AER must be 40 because GM says so.”(You are now introducing argument # 3 [Volt's gauges are inaccurate].)/ I already plainly posted that my contention (based on the screenshots and simple mathematical interpolations) has the Volt’s computer giving a real world AER (on that day, under those conditions) with a full battery at close to 26 miles. Based on the screenshots you CANNOT logically determine that rounding error has the computer estimating a full battery AER of 25 to 45 miles. We’ve got too much data for this.// I am NOT countering your argument # 2 [harsh driving has produced greatly reduced AER]. (I’ve got nothing to go on, neither do you)/// I am NOT countering your argument # 3 [Volt's gauges are inaccurate]. (I’ve got nothing to go on, neither do you)So, …….. I’m in agreement with you when you say:“You[r] whole argument hinges on the accuracy of these computer generated range estimates…..”YES!! Correct! Everything I’ve been talking about is based on the Volt’s gauges being accurate!  (Quote)

I have no general issue with GM criticisms. I have often enjoyed the experience myself. My issue is that they have “hung their hat on 40 miles AER”. If it had only come from Lutz or the like at this point, I’ld be more skeptical but they have consistantly confirmed this number and many months ago one of their lead engineers confirmed they had confirmed 40 miles while testing the mules on the city and highway EPA cycles. To assume from some screen shots and presumptions that this is 26 miles in realty is being overly critical. From everything we are seeing and hearing, my guess is that these 40 mile results are the raw test data and not what gets applied to the window sticker numbers. The 2008 changes will reduce the “real” world numbers to around 38 city and 35 highway, in my estimation. If this is accurate, GM has left themselves open to just criticism. Hopefully that can tweak the operation and battery window to get 40′s on the sticker but I think it will take a little more than 8.0KWh to attain this.

carcus1: If you would like Leno’s take on the accuracy of the range gauge, you can see that at 1:50/13:03 in the video.  (Quote)

Eyeballing a change coincidental change in the separate increments (miles range vs miles driven) doesn’t discount the margins of error in question.