Good place to get started ? want to get at lest 40-45MPG.highway.

[2000mc]

Originally Posted by Tahoe_Hybrid

at 55MPH... V8 mode it reports 48-55MPG "instant mpg" with no electric assist , at 55mph in EVT2 gear.. steady speed flat land.. with a slight head breeze it will drop

so i only need to pick the low hanging fruit

Can you make a run in both directions where, for more than 1/4 mile or so, you can keep that 48-55mpg heading each direction?
My gas hog shows 50mpg instant mpg on relatively flat land… just can’t seem to hold it up for long, or make it do it both directions.
I don’t know if you can reset your trip to get a good short term average mpg, but instant mpg really is more misleading than it is helpful in knowing your potential steady state mpg.

Go ahead and grab some of that low hanging fruit then. But that might just be enough to hit your goals under ideal conditions, if you want to get your average up there though, you’ll need maximum effort.

[Isaac Zachary]

Even single trip (one way) fuel mileage can be misleading. There are places I get 20-30mpg to get there and 99mpg (according to the MPG on the dash) to get back.

The hybrid system also messes up the facts since you almost always start out with a different state of charge than when your finish driving.

If you could spend a day doing the same trip over and over again and average out the total then you'd get a better idea of what the real fuel mileage is.

[ksa8907]

Originally Posted by Tahoe_Hybrid

i t's lost because they did not put a Eco mode button so it would stay in EVT2 longer at the expense of acceleration..


eco mode just changes the shift points... which is at the expense of acceleration..

It's not the right tool for the job.

If you don't have passengers with you, you aren't pulling a trailer, or have the interior loaded with cargo. You have the wrong tool for the job.

I know this because the vehicle drives much differently when you fill it with people and cargo. It would never hold such a low gear.

[Piotrsko]

There's probably a tuner out there somewhere that will write a program to flash changes when needed to your eco mode parameters. If you research enough you can probably do it by spoofing the sensor system in the drive line.

[mpg_numbers_guy]

If you've disabled cylinder deactivation then you're stuck with the thirsty V8. Does it have an EV mode button? If so then your best bet is probably P&G - drive a bit with the V8 on charging your battery, then EV mode for a bit, rinse and repeat. No way is that huge vehicle going to be able to hit 40 mpg unless it gets the full basjoos treatment, has a smaller engine, or a planetary gearbox like the Prius.

I have many words to say about people who buy an oversized vehicle because they think it keeps them safer....but I'll spare you.

[Tahoe_Hybrid]

Originally Posted by mpg_numbers_guy

If you've disabled cylinder deactivation then you're stuck with the thirsty V8. Does it have an EV mode button? If so then your best bet is probably P&G - drive a bit with the V8 on charging your battery, then EV mode for a bit, rinse and repeat. No way is that huge vehicle going to be able to hit 40 mpg unless it gets the full basjoos treatment, has a smaller engine, or a planetary gearbox like the Prius.

I have many words to say about people who buy an oversized vehicle because they think it keeps them safer....but I'll spare you.

that is not the point if your area had a 45-60mph speed limits in most areas

a larger vehicle is better more space to crumple when you get hit at 60mph..






the v4 mode does not save much gas at all the engine will cost more to fix if something gets damaged inside 3,000$ is the average repair cost for the AFM system

then i would ever save on fuel 21.5mpg was my last fill up... over the last 3 fill ups I averaged 22MPG this was on 100% v8 mode with the AFM disabled

I averaged 20.7 this month compared to march and april which were 18.5 and 18.8...


it does have a planetary gearbox it's a 6 speed Automatic transmission(electronically variable transmission) 4 Speed "Launch Gears" (it's in 4th gear at 30mph) (5th )EVT1 and (6th)EVT2 are the planetary gears...



literally the Engine will run at 1050 RPM at 55mph.... the problem is Aero resistance (i.e engine load) prevents it from staying in the second mode..

[freebeard]

a larger vehicle is better more space to crumple when you get hit at 60mph..

It was in the 1990s, before I carried a digital camera, when I saw a black Chevy Blazer K5 resting all alone in the middle of an empty intersection (no-one around) on the front of the hood and the windshield header.

Safety comes at you from all directions.

[Isaac Zachary]

Originally Posted by Tahoe_Hybrid

a larger vehicle is better more space to crumple when you get hit at 60mph.

Bigger vehicle doesn't always mean bigger and better crumple zones. Crinkle zones have to be made bigger themselves. Some bigger vehicles actually have smaller crumple zones. Bigger engine bays don't necessarily crumple and take more impact if the engine in there is humongous because engines don't have crumple zones.

The only vehicles to get perfect 5 star crash test ratings in every category by the NHTSA are mid-sized and small sedans, hatchbacks and station wagons, at least for the the 2020 and 2021 years.

[ksa8907]

Originally Posted by Isaac Zachary

Bigger vehicle doesn't always mean bigger and better crumple zones. Crinkle zones have to be made bigger themselves. Some bigger vehicles actually have smaller crumple zones. Bigger engine bays don't necessarily crumple and take more impact if the engine in there is humongous because engines don't have crumple zones.

The only vehicles to get perfect 5 star crash test ratings in every category by the NHTSA are mid-sized and small sedans, hatchbacks and station wagons, at least for the the 2020 and 2021 years.

This. And part of the reason crumple zones suck in large vehicles is due to the fact rhe vehicle is so large, requiring more energy before the vehicle is moved by an outside force therefore requiring crumple zones to be much less likely to actually crumple.

Dv/Dt

[Ecky]

It's worth noting that in some of the tests, vehicles are run into a rigid barrier or hit from the side with a fixed weight vehicle, and in others, they're collided with a vehicle of equal weight. Having more mass does (generally) have a positive influence in crash tests.

What I found interesting, reading about it this morning, was that crash tests more recently simulate more SUV and truck impacts (higher up with rigid bumpers), rather than sedan-type impacts, and these are found to be far more deadly for the occupants of other vehicles. It really is an arms race.