Dynamic Efficiency

[dbsb3233]

I've driven about 1000 mikes so far and routinely seeing close to 3.6. If I get on the local highway, Phoenix so its flat, doing 75 it drops to around 3.48

Wow, 3.48 at highway speeds is much better than anything else I've seen reported so far. I think it's the first 400+ (if sustainable).

 

[WeighingGravity]

You guys are doing a lot better than I am. I'm coming in under 2.5 miles/kwh - when I started I was closer to 3 (2.8-2.9) but it's been falling steadily and has really crashed out the last few days. Admittedly I am only 2 weeks in, but I'm starting to wonder if I have a drive unit issue.... gosh I hope not.

It's been fair weather here in the mid-Atlantic (until today); most of my driving has been around 55F, some higher some lower, not a ton of AC use, and although I do have a bit of fun accelerating every now and again, I'm mostly driving very tamely. My long-term Tesla S75D efficiency has been 3.13 miles/kWh over the last ~3 years of driving.

 

[BS8899]

Wow, 3.48 at highway speeds is much better than anything else I've seen reported so far. I think it's the first 400+ (if sustainable).

Are you driving from Colorado to Arizona? If so, wouldn't you get much better mileage because of the elevation change?

 

[dbsb3233]

Are you driving from Colorado to Arizona? If so, wouldn't you get much better mileage because of the elevation change?

I don't have my Gravity yet (still on order), but I've got 2 other EVs. We road trip all over the country, but most commonly between CO and NV. I always account for net elevation differences. It's one of the biggest factors.

 

[Bunnylebowski]

My dynamic efficiency has been hovering around 3.06-3.11, pretty much every time. My since last charge is less like 2.95 because I’ve been pre-conditioning the car a lot because of colder weather, but I’m still really impressed with what I’m getting in the Dream Edition on range wheels. An EV this heavy with this much space and 1067 HP getting over 3.0 mi/kwh is pretty remarkable.

 

[allenmhc]

My dynamic efficiency has been hovering around 3.06-3.11, pretty much every time. My since last charge is less like 2.95 because I’ve been pre-conditioning the car a lot because of colder weather, but I’m still really impressed with what I’m getting in the Dream Edition on range wheels. An EV this heavy with this much space and 1067 HP getting over 3.0 mi/kwh is pretty remarkable.

Whoa, how are you getting it that high?! Mine (also a DE w/ 20"s, though I swapped into them a month into ownership) has been steadily <2.6 mi/kWh, which is lower than my trip efficiency indicators. I wonder if it's a software bug, or just that the hills that I climb in and out of on local roads daily is causing that much of a range drop.

 

[Bunnylebowski]

Hills definitely impact it hugely, but my actual neighborhood is at the bottom of a hill that rivals San Francisco (it’s called College Hill) that I have to climb and descend a lot. Maybe the big descent helps offset the steep climb some.

 

[Ron_Burgundy]

I have one of my trips that I have not reset since delivery and it’s at 2.98 with 5,000 miles of all sorts of driving. I’ve been as high as about 3.4 and as lows 2.7 or so on dynamic - but dynamic is a bit misleading.

I say this because it’s unclear how it calculates. As in, over what period of time? As @Bunnylebowski mentioned, I can get my dynamic efficiency to go up immediately, and significantly, by going down a huge hill. I can also make it go down, almost immediately, by simply selecting “sprint” mode and not changing my driving style (I understand why).

In a relatively flat road trip at about 67mph on average, 55 degrees, clear weather, I got dynamic all the way up to 3.35 or so (it’s up thread somewhere). In fact, I seem to get worse dynamic levels in stop and go traffic - which is counter to my experiences in our X and R1S.

My point is this - I recommend ignoring dynamic efficiency and looking at trip A or trip B for real efficiency over time. Or the “since last charge” in the energy app - but the oddly doesn’t show kWh.

 

[Ron_Burgundy]

One other thought - it’s turning colder here in the mid Atlantic and I am very interested to see how badly that impacts efficiency. Cold crushes our X (with heat pump) and R1S on road trips, so I expect the same with the Gravity.

 

[NovemberLima]

Speaking of efficiency and trip/energy data, why oh why are cars still only providing “Trip A” and “Trip B”? We have huge screens, tons of compute power, loads of apps, why not provide an actual list of trips with a nice table of data? It would be super simple to list date, elapsed time, start and end points, distance, consumption, etc. You could easily let the user clear them.
Anyway, I appreciate there’s higher priority issues but it seems like an oversight that our modern EVs still don’t have this.
I would be happy to at least have elapsed time and consumption data for trip a, trip b, since last charge, and “current drive”. These should also be shown on the trip widget on the cockpit panel, it makes no sense to me that they have a widget with a ton of screen real estate and they only show distance?!
Also, agree with others that the dynamic efficiency widget is useless without telling you what the range they are sampling is… is it 15 mins, 15 miles, 100 miles, 24 hours, who knows. Ideally you should be able to choose in the energy app and it should be reflected in the widget.

 

[electric]

It would be super simple....

I'm sure it's on Lucid's to-do list for simple things, right after "make sure buttons don't disappear from screens", which is just a tad simpler than dynamic range widget

 

[allenmhc]

Hills definitely impact it hugely, but my actual neighborhood is at the bottom of a hill that rivals San Francisco (it’s called College Hill) that I have to climb and descend a lot. Maybe the big descent helps offset the steep climb some.

Right, I do notice that the efficiency creeps up in 0.01 mi/kWh increments as you're sliding down the hill, and then reduces proportionally on the way back up.

The more I think about it, the more I think it is bugged in some way in my car. I've been driving the same way now for ~2 months, and it has consistently gone down from the 2.8–2.9 mi/kWh range (which I'd be happy with) to now the 2.5 mi/kWh value. It's almost like every time I start the car it burns an extra 1 kWh or something.

 

[boydracing]

The efficiency rocks on my Gravity Dream on 20/21” wheels. Just this AM I drove from Providence to Natick service center and back to get key fob update, it was 45-50F outside, went 71mph almost the entire distance aside from exiting to get on I 495 and then I 90, and got 3.11 mi/kwh. If you multiply that by the total usable battery 120kwh then that’s 376 miles of range which is still better than Tom Moloughney got in the Gravity 5 seater at identical speeds and flatter surface and I was at colder temperatures, had 400 foot elevation increase, have 7 seats and 200 more horsepower. So even at 45F I got 91% of the EPA Gravity Dream is rated for on range wheels.

Huge laughter from Utah!
On my two trips, reminding everyone, speed limit most of the way was 80 mph (was doing 83-90), I was pulling down 2.42 to 2.65. Speed is the single most factor IMHO for efficiency. From the bay area (Alamo, CA) to Lake Tahoe/Reno area, I noted 2.72 - but, I did encounter traffic going through Sacramento area and kept my speed very conservative. Now, driving in the mountains and around town from 5500 to 9000 feet, I am ranging from 2.86 to 3.14 (pi) with cold weather setting in. Oh, and charging at home is SO much cheaper as my kilowatt charge is right at .07 to .08 cent per kW off peak. Its like running the dryer at night only more fun and less noise. DE w/ 21/22.

 

[zoomzoom]

I've had the car for a few hundred miles now, 7 seats, mid sized wheels. I'm getting ~2.6 average. 2.8 mi/Kwh max. I do punch it now and then but I don't have nearly as many opportunities as I'd like with Bay area traffic. Been mostly warm still after slightly brisk mornings. Sort of surprised how low it is.

Haven't seen the numbers for long distance road trip driving with family....

 

[maxtor10000]

I've had the car for a few hundred miles now, 7 seats, mid sized wheels. I'm getting ~2.6 average. 2.8 mi/Kwh max. I do punch it now and then but I don't have nearly as many opportunities as I'd like with Bay area traffic. Been mostly warm still after slightly brisk mornings. Sort of surprised how low it is.

Haven't seen the numbers for long distance road trip driving with family....

I'm also in the Bay Area and average ~2.9 mi/kWh in a normal week (~50/50 mix of highway and surface streets) in my 7-seater GGT with 20/21" wheels. I recently did a couple of roundtrips over the hill to Santa Cruz (~50 miles each way, mostly highway with some stop-and-go traffic) and also averaged 2.9 mi/kWh. The dynamic efficiency widget consistently reads lower at ~2.6-2.7 mi/kWh. I wonder if it is intentionally set to be conservative to minimize the risk of running low and getting stranded.

 

[boydracing]

I've had the car for a few hundred miles now, 7 seats, mid sized wheels. I'm getting ~2.6 average. 2.8 mi/Kwh max. I do punch it now and then but I don't have nearly as many opportunities as I'd like with Bay area traffic. Been mostly warm still after slightly brisk mornings. Sort of surprised how low it is.

Haven't seen the numbers for long distance road trip driving with family....

I would wait for 2,000 miles to start really looking at efficiency. My Gravity was running around 2.42 to 2.65 for most of the 2,000 miles. I ended up getting it down to 2.26 or something like that while taking some spirited drives around Oakland Hills and Crow Canyon Road while visiting in bay area (I had less than 1,000 miles). Now with over 4,000 miles, I am averaging a little below 3.00 which is fine for me. I think if I get a little above 3.00 (I did achieve 'pi'!) with the way I drive, I am good with living with the 'Green Goblin.' Just commenting on my unique experience and results. Also, I am not really trying to drive like a Prius either - I purchased to enjoy so there is that.

 

[Alex]

I just completed a 200 mile trip with an elevation change of about 4600 ft from home in Tucson, AZ to vacation home Pinetop, AZ. Full 100% (437 rated). I've done this trip before in the Gravity, but I decided to keep track of the power usage this time (Trip B - didn't reset until ½mi into trip) - see attached. You can see the elevation changed in the Actual Usage. The Estimated is just a linear line. I thought it would take elevation into account. Tesla for, example, takes elevation and temperature into account. Dynamic range is at end of trip. Most of the speed limit is 55-65mph, where I drive 62-73mph.

 

[Ron_Burgundy]

I just completed a 200 mile trip with an elevation change of about 4600 ft from home in Tucson, AZ to vacation home Pinetop, AZ. Full 100% (437 rated). I've done this trip before in the Gravity, but I decided to keep track of the power usage this time (Trip B - didn't reset until ½mi into trip) - see attached. You can see the elevation changed in the Actual Usage. The Estimated is just a linear line. I thought it would take elevation into account. Tesla for, example, takes elevation and temperature into account. Dynamic range is at end of trip. Most of the speed limit is 55-65mph, where I drive 62-73mph.


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That’s actually not as bad as I would have guessed for so much elevation. What was the weather like?

 

[Alex]

That’s actually not as bad as I would have guessed.

It's funny, but my Cybertruck, which has a 317mi rated range, weights more than the Gravity, with worst aerodynamics used 212 rated miles for this 200 mile trip. And that's with all terrain tires - also going the same speeds.

 

[Pragmatic]

Doesn't the CT have a larger battery? Rather than range you should be comparing kw-hr used by each for the trip.