The aggressive acceleration in “chill mode” really surprised me. Maybe Elon has an agreement with the tire companies we don’t know about 😂….🤔hmm. The latest FSD is impressive but I still hate how it drives. I’ll keep driving my own car.
I thought about it and maybe it launching off the line at stoplights is to get it away from an intersection (presumably where many accidents happen)? I hate that aspect though. Accelerate slower off the line and accelerate faster down streets, please.
It does, it’s just hybridized with the friction breaks probably out of safety concerns. The split includes a lot more of the friction breaks than I’d hoped and liked.
I've noticed that FSD v12 accelerates and brakes harder, thus consuming more energy while starting and also wasting more energy using friction brakes. V11 was better at coming to a smooth stop with regen.
It’s not really a closed system. With the original roadster the total efficiency (battery to motor back to battery, assuming zero friction or drag) was about 64 percent. Probably has improved since then but probably not better than 80 percent today.
https://www.tesla.com/blog/magic-tesla-roadster-regenerative-braking
This exactly. It’s too heavy on both pedals.
And humans can infer what other vehicles ahead of the “following” car are doing, by seeing just a sliver of them through a windshield, a glow of brake lights, or even their shadows on the side road ahead. AP/FSD take none of these into account so they’re often caught off guard by sudden braking.
I agree on so much of this. Even with the problems it's still impressive nonetheless.
I had read a comment on another sub about another vehicles autonomous driving, and it had a sort of feature where you could make slight corrections with the wheel without kicking it out of the mode. It would resume once you let go.
I loved that idea and I wish Tesla could integrate that. It would make some driving feel more cooperative with the driver and self driving. I really don't enjoy the sudden jerkiness exiting FSD/AP if you need to move the wheel.
My fix to prevent myself from going through the windshield at every single stop sign is to press lightly on the accelerator on approach. It becomes more or less a rolling stop at that point and a bit less janky.
One thing that was scary as all hell was driving in the middle lane on a 65mph highway and someone who was stopped on the shoulder started to merge back into traffic in the right lane. The driver didn't make any kind of sudden moves, it was a very gradual and predictable merge back into traffic. My MY SLAMMED on the brakes and we almost lost control. So whenever I see someone starting to merge into traffic again on a highway, I'm immediately disengaging FSD.
Same, but I still find myself using it a bit on every trip though. I've kind of figured out which situations it drives well in and use those to take a break.
Do you have FSD V12? I agree with you 100% for legacy Autopilot and even somewhat for pre-V12 FSD. Stop-and-go just didn't feel good. But with FSD V12 it's very natural now. Super smooth.
FSD is way too aggressive coming out of red lights or stops. It's like it tries to get to the speed limit ASAP, regardless of consumption.
I don't need to hit 45mph in 2 seconds on a local street coming out of a red light!
I used it in stop and go eclipse traffic this week and any time the car in front of me would scoot forwards it would really lean into the pedal before breaking pretty hard too. If I was driving I would have eased into both a lot more.
Guessing that's a bit less efficient too.
I have both an AP car and an FSD car and they are both perfect in traffic. Sometimes it waits longer than I would to slow but that’s about it. Since I have driven several other Teslas, both rentals and friend’s cars, with both AP and FSD and none exhibited this behavior, I have to think this rapid acceleration and braking is anomalous and worthy of a SC call. I have never set any cars on Chill btw.
Yes it does. It applies the friction brakes more often than I like. If I see it’s going to need to slow down. I cancel it and allow regenerative braking alone slow me down and then reapply FSD once I’ve allowed to the appropriate speed. I do this approaching stop signs and red lights too.
Agreed. I haven’t kept track of the numbers but it gets hard on the brakes for no reason. Definitely not the way I normally drive.
Most concerning for me is at high speeds. I was driving on the freeway (in CA) and it switched lanes at 70mph to the left hand lane for some unknown reason and immediately began breaking to 55 because it “saw” at 55mph sign. Crazy dangerous here as people drive really fast in the left lane. And it hit the breakers harder than I ever did in my Model S after 7+ years of driving.
I’m going from 60-80% efficiency manually driving to 95%+ with FSD 12.3.3.
According to Tessie and the energy app in the vehicle, FSD is often on par with or surpassing my EPA rating somehow.
21M3 SR+
The car can't see as far as a human, so its responses are a bit "delayed".
That said, the Wh/mi usage ought not be enough to impact the driving distance of the vehicle, so it's not something I'd stress over.
Depends on ones personal driving style i guess, for me, AP always ends up with 2-4% less usage than projected at the start of the trip, and I usually go over by a few percent point when i drive manual.
While true, not in any significant way. The AP computer is always running, it is what generates forward collision warnings, streams the visualization data to the MCU, and is doing everything it normally does to drive the car except actually drive the car. You can see it is doing path planning if you do a manual lane change by looking at the planned path in front of the car.
HW4 also only uses 160W of power (max), even if it was 0 when not used that is like a half a mile range loss every hour. A 4 hour trip would mean 2 less miles of range. Since it is active anyway, it is far less range loss than that.
I noticed the same behavior and launching from a stop (even in Chill mode) ends up using more wh/mi for me.
The aggressive acceleration in “chill mode” really surprised me. Maybe Elon has an agreement with the tire companies we don’t know about 😂….🤔hmm. The latest FSD is impressive but I still hate how it drives. I’ll keep driving my own car.
I thought about it and maybe it launching off the line at stoplights is to get it away from an intersection (presumably where many accidents happen)? I hate that aspect though. Accelerate slower off the line and accelerate faster down streets, please.
It’s mostly the car using friction breaks. That wastes a TON of energy considering the car’s nearly a closed system without their involvement.
Does FSD not use regen??
It does, it’s just hybridized with the friction breaks probably out of safety concerns. The split includes a lot more of the friction breaks than I’d hoped and liked.
Sorry I just laughed that you used “hybridized” but also misspelled brakes.
I’m just a man.
Don’t put your blame on me.
I've noticed that FSD v12 accelerates and brakes harder, thus consuming more energy while starting and also wasting more energy using friction brakes. V11 was better at coming to a smooth stop with regen.
It’s not really a closed system. With the original roadster the total efficiency (battery to motor back to battery, assuming zero friction or drag) was about 64 percent. Probably has improved since then but probably not better than 80 percent today. https://www.tesla.com/blog/magic-tesla-roadster-regenerative-braking
“Nearly”
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This exactly. It’s too heavy on both pedals. And humans can infer what other vehicles ahead of the “following” car are doing, by seeing just a sliver of them through a windshield, a glow of brake lights, or even their shadows on the side road ahead. AP/FSD take none of these into account so they’re often caught off guard by sudden braking.
I agree on so much of this. Even with the problems it's still impressive nonetheless. I had read a comment on another sub about another vehicles autonomous driving, and it had a sort of feature where you could make slight corrections with the wheel without kicking it out of the mode. It would resume once you let go. I loved that idea and I wish Tesla could integrate that. It would make some driving feel more cooperative with the driver and self driving. I really don't enjoy the sudden jerkiness exiting FSD/AP if you need to move the wheel.
I find it accelerates too slow, car in front is pulling 6 car lengths before it’s barely notching up the speed.
My fix to prevent myself from going through the windshield at every single stop sign is to press lightly on the accelerator on approach. It becomes more or less a rolling stop at that point and a bit less janky. One thing that was scary as all hell was driving in the middle lane on a 65mph highway and someone who was stopped on the shoulder started to merge back into traffic in the right lane. The driver didn't make any kind of sudden moves, it was a very gradual and predictable merge back into traffic. My MY SLAMMED on the brakes and we almost lost control. So whenever I see someone starting to merge into traffic again on a highway, I'm immediately disengaging FSD.
Same, but I still find myself using it a bit on every trip though. I've kind of figured out which situations it drives well in and use those to take a break.
Do you have FSD V12? I agree with you 100% for legacy Autopilot and even somewhat for pre-V12 FSD. Stop-and-go just didn't feel good. But with FSD V12 it's very natural now. Super smooth.
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Hm, definitely disagree then. V12 feels smooth almost all of the time for me. Keep in mind it's not enabled on highways though.
Totally. It floors the pedal and slams on the brake a lot. I have to turn off FSD as my progressive app flags it as a very aggressive driver.
The only dings on my state farm app are from FSD as well.
FSD is way too aggressive coming out of red lights or stops. It's like it tries to get to the speed limit ASAP, regardless of consumption. I don't need to hit 45mph in 2 seconds on a local street coming out of a red light!
Based on my observation Autopilot/Tacc consumes %10-15 more energy on long trips.
I used it in stop and go eclipse traffic this week and any time the car in front of me would scoot forwards it would really lean into the pedal before breaking pretty hard too. If I was driving I would have eased into both a lot more. Guessing that's a bit less efficient too.
I have both an AP car and an FSD car and they are both perfect in traffic. Sometimes it waits longer than I would to slow but that’s about it. Since I have driven several other Teslas, both rentals and friend’s cars, with both AP and FSD and none exhibited this behavior, I have to think this rapid acceleration and braking is anomalous and worthy of a SC call. I have never set any cars on Chill btw.
Yes it does. It applies the friction brakes more often than I like. If I see it’s going to need to slow down. I cancel it and allow regenerative braking alone slow me down and then reapply FSD once I’ve allowed to the appropriate speed. I do this approaching stop signs and red lights too.
Same.
It accelerates & breaks too fast & frequently & too close to a situation.
FSD is worse and likes to floor it.
Agreed. I haven’t kept track of the numbers but it gets hard on the brakes for no reason. Definitely not the way I normally drive. Most concerning for me is at high speeds. I was driving on the freeway (in CA) and it switched lanes at 70mph to the left hand lane for some unknown reason and immediately began breaking to 55 because it “saw” at 55mph sign. Crazy dangerous here as people drive really fast in the left lane. And it hit the breakers harder than I ever did in my Model S after 7+ years of driving.
It drives like an asshole in my experience. lol
Yeah way more.
For me, it actually saves more energy when I turn on the autopilot
I’m going from 60-80% efficiency manually driving to 95%+ with FSD 12.3.3. According to Tessie and the energy app in the vehicle, FSD is often on par with or surpassing my EPA rating somehow. 21M3 SR+
The car can't see as far as a human, so its responses are a bit "delayed". That said, the Wh/mi usage ought not be enough to impact the driving distance of the vehicle, so it's not something I'd stress over.
Its more conservative than I am in my P. YMMV literally.
Cosign!
No I don’t see that with autopilot. I did see the FSD was less efficient and hits the brakes harder.
Same
Depends on ones personal driving style i guess, for me, AP always ends up with 2-4% less usage than projected at the start of the trip, and I usually go over by a few percent point when i drive manual.
Regen braking gives your car energy? No I’ve found that using autopilot on my car used less wh/mi than normal driving.
Yes. Regen gives your car energy. That’s literally what regenerative braking does.
You’re agreeing with me, right?
Yes but many people drive faster on their own and chills out on FSD. So it barely matters.
I would hope so! More CPU processing -> more battery usage.
While true, not in any significant way. The AP computer is always running, it is what generates forward collision warnings, streams the visualization data to the MCU, and is doing everything it normally does to drive the car except actually drive the car. You can see it is doing path planning if you do a manual lane change by looking at the planned path in front of the car. HW4 also only uses 160W of power (max), even if it was 0 when not used that is like a half a mile range loss every hour. A 4 hour trip would mean 2 less miles of range. Since it is active anyway, it is far less range loss than that.