Hi Tbaleno:
___If your pack is low, you should definitely grab regen w/out a forced autostop or if you do not have a longer highway cruise coming to bring her up slowly. A normal autostop usually comes after most of your heavy regen is complete anyway so there is that take on it as well. You have some fuel cut during regen so it isn’t that you are losing a lot of fuel but you are losing momentum in a hurry which hinders your overall FE in a very big way .
___Your best bet imho is try not to let the pack drop by more then 2 bars from full and you can allow autostop or force one whenever you deem it necessary.
___Good Luck
___Wayne R. Gerdes
___
Waynegerdes@earthlink.net