Any of you HAH '06 owners notice any issues after your software update? Both my Navi and my central mileage calculators are off by about 4mpg. My Navi stated 27.4 MPG, but when I calculated my mileage, it was 31.1. Anyone else notice this?

On my 2005 HAH, sometimes the navi mileage is about 5 MPG low (relative to both manual calculation and the instrument cluster). I've had no software update (that I know of).

I've only observed this twice, so I'm not positive of the conditions. I think it happens when the initial mileage on the tank is actually low (stop & go). I've never seen this happen when the first few miles are on the open road and the mileage is actually high.

Anyone else observed anything like this?

AB in SJ

I noticed this issue when the software was upgraded, but I was having them look at some other issues and I figured they must have been letting the car idle in the shop for a while.