I'd probably pop a service request to tesla and ask them about it. Could be something set up incorrectly?

I'd check EV database figures for both as well to see whether the efficiency just is worse by as much as you have experienced.

 

EV Database says 267mWh/mi for the RWD and 268mWh for the LR RWD so pretty similar - not the 60mWh/mi difference I’m currently seeing.

I will raise an issue with Tesla tomorrow.

 

I covered more than 22k miles in my 2023 (so pre-HL) Model 3 LR RWD and it averages 230Wh/mile. EV database claims 246 Wh/mile average so I'm happy bunny. I know it is not Model Y but just for comparison.

NCM battery despite being bigger capacity is actually lighter (better density) than LFP: Y RWD weighs 1984 kgs while LR RWD weighs 1959kgs

 

I'm getting similar (or slightly worse - around 3.2 with a roughly 33:67 mix of urban and 75mph motorway) with an Ioniq5 84kWh RWD.

Likely the mixed weather.

Doubt there's an issue, though Ioniq5 is not Ioniq 28/38 for efficiency!

 

I'm getting similar (or slightly worse - around 3.2 with a roughly 33:67 mix of urban and 75mph motorway) with an Ioniq5 84kWh RWD.

Likely the mixed weather.

Doubt there's an issue, though Ioniq5 is not Ioniq 28/38 for efficiency!

I don’t view the Ioniq5 as a particularly efficient car. The original Ioniq was. The one I borrowed was doing 5 miles per kWh on the motorway and 6.5miles per kWh in town. My old Kona was pretty decent too.

All Tesla’s should be able to average 4 miles per kWh (250mWh/mile). If you look at the claimed WLTP range figures for the Ioniq5 they’re nowhere near what Tesla claim for the Model Y. I’m looking at 2 nearly identical Model Ys, the only difference is the bigger battery (and possibly the motor is different) and the efficiency is definitely significant worse. It’s at least 20% worse. My old RWD was doing 4 miles per kWh when the outside temperature was sub-zero. It was 12C yesterday, heating off, tucked in behind a tall truck at 56mph and it still couldn’t crack 4 miles per kWh. That’s not right.

 

May just be me but since the new software update that removed the 5/15/30 mile graphs to a combined overall efficiency graph seems higher than before. Only way I'll know for sue is if I don't get back down to 230 wh/mi for my typical commute in summer.

 

The recent software update that switched the energy consumption screen to 200 miles has significantly reduced my predicted range on a charge. All my journeys are now predicting ~160 miles from my 48 kwh useable capacity. However EPA range (overestimates as we know) was saying 112 miles range from 52% battery left because I was down to 259 wh/mi this morning. Quite a difference

Last Friday 5C wet conditions I was not able to get below 300 wh/mi. same commute but now 10C dry and as above I was down to 259 wh/mi so the weather made quite a difference. Same route and same starting SOC. Not a laboratory test of course.

I'll just rely on my BAT% and wh/mi plus man math from now on!

This is a M3 SR+ 2019. Continental all weather tyres that are a few percent worse than my previous Cross Climates for efficiency.

 

I don't know what it was about the weather last night but I got quite poor efficiency in an original Ioniq 38 too.

Near enough all motorway, totally empty as it was 11pm. Not a massive trip (but one I do many times per week) of 55 miles, average speed 55mph with top speed of 71mph and doing 70mph for as long of the journey I could (so 75%+) came in at only 3.9 miles per kwh. No heating on, just seat heaters.

 

I don't know what it was about the weather last night but I got quite poor efficiency in an original Ioniq 38 too.

Near enough all motorway, totally empty as it was 11pm. Not a massive trip (but one I do many times per week) of 55 miles, average speed 55mph with top speed of 71mph and doing 70mph for as long of the journey I could (so 75%+) came in at only 3.9 miles per kwh. No heating on, just seat heaters.

If you were ploughing into a 20mph headwind it would make quite a difference.
It has been pretty breezy, it's just not as obviously noticeable as the trees have no leaves.

 

I’ve had a RWD LR for a similar amount of time (just over 500 miles) mainly motorway and dual carriageway, admittedly with some road works but averaging 270wh/m so far. Which I’m happy with compared to my old e-Golf, if I can average 4 m/kwh over the year with the driving I do then it will be a result, the e-Golf would only do that in the summer on my commute. The model Y also seems a lot more efficient when charging at home on AC than the Golf.

 

Long shot but I wonder if you're tracking is way out causing it to create more drag? Its hard to know without actually having it checked

Head wind can also play a factor. Driving into a head wind effectively adds your speed to the wind speed - so 50 in a 30 mph head wind is like doing 80, and the penalty for that isn't fully recovered when driving back - ie 50-30 = 20 doesn't save as much as you lost. But I think winds have been relatively light since the storm a week or so ago.

For reference, our Model Y LR AWD would get around 260wh/m efficiency and only go above 300 at motorway speeds. I've only ever seen it below 230 when its been much better weather than we have at the moment, ie summer, and driving steadily at 50 or below.

 

I'd dream of getting 309 milliwatt-hours per mile (mWh/mi)! What does the leading m stand for, please?
[My primitive non-Tesla with the aerodynamics of an oil refinery runs more like 290 000 milliwatt-hours per mile on a good day.]

 

I‘m also quite surprised that the Berlin build quality isn’t as good as Shanghai - the panel gaps are bigger (I measured them) and the doors need a really hefty shove to close them but they have fixed the positioning of the seat-belts so they no longer cut into your neck. The software also seems to be slightly different between the two cars (Hardware 4 vs Hardware 3?)

Common knowlege claims Shanghi build quality is the best. HW3 and 4 might be getting updates at differnt times because of FSD software diffrences.

My HW3 model 3 just got a software update that made many small changes to the user interface. For example the park assist display is improved. I need to go look for documentation.

Does HW 4 seem to help with autowipers and cruise control?

 

Common knowlege claims Shanghi build quality is the best. HW3 and 4 might be getting updates at differnt times because of FSD software diffrences.

My HW3 model 3 just got a software update that made many small changes to the user interface. For example the park assist display is improved. I need to go look for documentation.

Does HW 4 seem to help with autowipers and cruise control?

No, windscreen wipers are still Beta, cruise control is still Beta and they seem to have removed the audible over-speed warning that I always relayed on to let me know I was speeding. And yes, I know I should be aware of the speed limits at all times but I’m not perfect and the three sets of bongs always let me know Id missed the sign.

 

I'm getting truly abysmal efficiency in my iX. I live in a very cold climate where winters average -10 Celsius. It also doesn't help that my commute is very short, only about 3.5 miles each way to work. I'm getting about 1.5 miles per kwh due to pre-heating the car before departures.

On the flip side though, during road trips I'm getting 2.5 miles per kwh even despite the cold. So that's really not bad considering the heavy 110kwh battery the iX has that makes this vehicle nearly 3 tons. lol

To put things in perspective, the bolt I had before this only managed 2 miles a kwh for my trips to work and 3 miles per kwh on road trips during this time of the year.

Point being, with or without heat pumps, winters are tough on EVs.

 

Don't need to use indicators where they are not going to inform other drivers of anything, or may give an ambiguous message. Indicate to run your driver side wheels down a white line to avoid a pothole when no-one will be affected by the manouevre? Nay lad 😄

And speed limit cameras can be notoriously wrong - my old MG used to read the speed limit on the back of HGVs, or miss the sign leaving roadworks having it tell me that I should still be doing 50mph.

Off they go, and off they stay.

(emergency braking stays on though)

 

I was watching the speed limit indicator last night as I drove home along a 70mph dual carriageway, the thing was on autopilot (dunno why they can't just call it cruise control like everyone else). As the car went over a bridge, it decided the speed limit should be the limit of the road under the bridge, 30mph. This is where the whole thing falls flat on its over regulated and controlled face. Luckily the the car didn't throw out the anchors, it just started to slow before I poked the accelerator to override it.

Same thing happens regularly on the M1 Northbound at Newport Pagnell Services - there's something on the walkway over the motorway that confuses the car. Driving up there with the autopilot set to 70, it suddenly drops to 60 as you go under the walkway.

The Tesla, with its total reliance on cameras for everything is a nightmare sometimes - it reacts to things that don't exist, pulling at the wheel, bringing up messages onscreen accompanied by panicky bongs when it sees a shadow. I've had it apply the brakes in panic because it thought I was going to hit a truck - it was parked in a layby but it was inline with where the car thought it was going due to the camera, we were on a slight bend.

The way these systems work at present, you have to be more alert to the car doing strange things than ever before instead of just looking out for other road users. We're actually going backwards in terms of safety. I guess they've done all the things that make sense, now they're just desperately looking for things to justify their existence.

 

But none of those things are related to my wanting to be warned when the speed limit changes and I’m going too fast. They’re all irksome but you can’t turn any of them off.

Your point seemed to be that even through you claim to drive at or under the speed limit and only cross white lines having indicated and checked it’s clear STILL received warnings and tugs in the steering wheel. I suspect you’re being a little economical with the actualité.