Thanks Mark

"The major difference in the two systems is that you don't have to 'trick' the ICE into turning off, once the system is warmed up. You just lift your foot off the accellerator and it turns off."

My wife would get much better mileage with that feature.

"Further, the ev will run at any speed where it is capable of pushing the car. I regularly use the ev at speeds in the 44-50 miles per hour zone. On the freeway, on a long but not steep downhill where coasting would bring you below 50, the ev will hold your speed. Also because the EV package has so much more power avaialbe, it will carry you up those little upgrades that would cause the FEH to start the ICE."

So your saying EV is possible up to 50mph?

"Low in the HH is called "B", for whatever reason. It uses enging braking to slow the truck down, so one can't use it like one uses "L" in the FEH, but since you don't have to trick the ICE into shutting down, it is less necessary."

Ok, let me understand this better. The FEH does not have engine braking, it uses the traction motor as a generator which slows you down. I think "B" is the same thing as the FEH "L" and will charge the battery faster with pure regen, am I right? I use "L" for both shutdown, but mainly for regen to continue long EV driving. So the HH can travel at speeds up to 50mph, but can you give me a distance before the battery restarts the ICE?

"I have no numbers to prove that coasting in "N" works the same way as it does in the FEH, but I use it the same way and it seems to provide longer and 'free-er' coasting."

Can the HH be towed all four wheels down in neutral? That will help me figure the drive link. Also, does coasting in neutral feel free-er than Drive?

"OH, the a/c is separate from the defroster, so you can run the defroster without penalty, AND if you do run the AC, it is electrically driven, instead of run off the ICE."

I like the sound of that!

"My trucks get driven by my wife, who is NOT a hypermiler. I get 33-35 mpg tanks on the FEH AWD, and 30-32 mpg tanks on the HH when I get either one for a whole tanks worth."

That's very good mileage for the AWD FEH, is your HH 2WD or 4WD? I would only be interested in the 2WD HH down here. At any rate, 30-32mpg is much better than I've heard in any case.

"I'm in California, so I can't just offer to go for a ride with you... or I would."

Thanks, I grew up in Santa Clara but love the Ocean for diving and fishing here.

I ask a mouthful of questions, but does anyone else here have anything to add to Mark's great comments? Also, came back to Mark for more clarification with more questions.

TIA
GaryG