Hi Gauthig and Tink:

___Both of you might be interested in the sixth post down in the following thread:

By hand or by screen?

___Tink, I was actually hoping you would have read this already given your NAVI accuracy posts to date.

___Gauthig, the E/T is used in the miles per hour calculation and it looks to calculate very closely to my usual Chicago traffic nightmare after an entire tank.

The following is information taken directly from the NAVI’s TC screen relative to this discussion over my first 7 tanks …

4/10/2005: E/T= Did not record /// TC Distance = 788.4 miles /// Avg. miles per hour = Did not record
4/14/2005: E/T= 17:32 ///////////// TC Distance = 859.0 miles /// Avg. miles per hour = 49.1 miles per hour
4/19/2005: E/T= Did not record /// TC Distance = 766.3 miles /// Avg. miles per hour = Did not record
4/23/2005: E/T= 16:01 ///////////// TC Distance = 828.4 miles /// Avg. miles per hour = 51.7 miles per hour
4/27/2005: E/T= 15:29 ///////////// TC Distance = 802.2 miles /// Avg. miles per hour = 51.8 miles per hour
5/01/2005: E/T= 16:02 ///////////// TC Distance = 832.3 miles /// Avg. miles per hour = 51.9 miles per hour
5/06/2005: E/T= 16:11 ///////////// TC Distance = 857.9 miles /// Avg. miles per hour = 53 miles per hour

___The E/T’s match what I believe to be my normal slightly above the limit highway driving with the occasional Chicago traffic jams and local 2 to 3 mile drive through subdivisions, malls, local streets, security gates, parking lots, etc. from work or home. I will watch the E/T w/ the clock tomorrow morning again to be sure.

___As for the averaging mpg error from take off for 10 minutes, you are lucky to hit 29 mpg after that short a period. If you don’t believe the averaging display, reset it while you are moving at 55 miles per hour and then you will see the average display more closely follow what the Instantaneous is showing. Any time you mix a start from stop to highway speed and highway speed together, you will always come up short on the averaging display even if you stayed at highway speed for an infinite period of time. You can however make that initial FE hit for the first 3 or 4 minutes become less of a hit by driving a longer distance. Tink is dead on right with his commentary about this.

___Good Luck

___Wayne R. Gerdes
___Waynegerdes@earthlink.net