We need your Half a million mile degradation expectations

[Marks321]

I hope to keep my car for 10 years. I’m adding 50,000 miles or more per year. Curious what you think my usable range might be at 500,000 miles
in the first 100,000 I will probably be at 295/316 or 21 miles lost in 100k. if we 5x this that would be 105 miles lost ouch, but keeping in mind the first 40k had the most loss before the real data started being captured. plotting a trendline with the real data gathered between 40k and 90k miles it looks like at 500,000 I'll be at around 236 miles max charge(80 miles lost about 25% original capacity) ... adding percent chart at the bottom

PERCENT	MILES		MILES	PERCENT OF ORIGIONAL 316 MILES
100	316		310	98.10126582
95	300.2		300	94.93670886
90	284.4		290	91.7721519
85	268.6		280	88.60759494
80	252.8		270	85.44303797
75	237		260	82.27848101
70	221.2		250	79.11392405
			240	75.94936709
			230	72.78481013
			220	69.62025316

 

[Jelger]

Enough data about this. First 30.000 miles you loose approximately 5% and each 30.000 miles after that you loose approximately 1%.

 

[Marks321]

Enough data about this. First 30.000 miles you loose approximately 5% and each 30.000 miles after that you loose approximately 1%.

ok that is certainly possible, dong the math quick I'm getting 20.667% range loss with that methodology, I would be very happy with that

 

[ucmndd]

At 5.5 years and 140,000 miles, my Model S has lost 12% of its original range.

Almost all of that was in the first 3 years. It has been remarkably consistent since then - degradation slowed dramatically.

 

[Vicj]

Hmmmm. I've lost about 7% in one year. Just did the "take it all the way below 10% and charge back up to 100%, letting it sit for a couple hours at each end for the BMS to read. I did it twice this week. At 100% this morning, it read 284 miles. Hopefully, that rate of degradation will slow down. But who really knows. My lifetime WpM is 258. So it's not like I'm thrashing it all the time either. The worse habit I have is cruising at 70 on a lot of highway driving.

 

[jjrandorin]

I hope to keep my car for 10 years. I’m adding 50,000 miles or more per year. Curious what you think my usable range might be at 500,000 miles
in the first 100,000 I will probably be at 295/316 or 21 miles lost in 100k. if we 5x this that would be 105 miles lost ouch, but keeping in mind the first 40k had the most loss before the real data started being captured. plotting a trendline with the real data gathered between 40k and 90k miles it looks like at 500,000 I'll be at around 236 miles max charge(80 miles lost about 25% original capacity) ... adding percent chart at the bottom
View attachment 805721

PERCENT	MILES		MILES	PERCENT OF ORIGIONAL 316 MILES
100	316		310	98.10126582
95	300.2		300	94.93670886
90	284.4		290	91.7721519
85	268.6		280	88.60759494
80	252.8		270	85.44303797
75	237		260	82.27848101
70	221.2		250	79.11392405
			240	75.94936709
			230	72.78481013
			220	69.62025316

At 10 years 500k miles, I think your battery capacity will still be usable, whether its 15% degradation, or 30% degradation. Your issue will be paying for all the other stuff that is likely to happen piling on those type of miles.

I realize fully that anyone putting on those kind of miles is likely putting mostly highway miles on them, but I still think the rest of the car will have enough issues for you to not want to fix them, before you get to 10 years 500k miles.

I have a separate question for you. I doubt you started piling on those miles right when you bought this car, so what car were you piling them on before, and how long did it last / how much did it cost to keep it running?

 

[cwerdna]

I doubt you will make it to 500K miles either on your original pack or still have your vehicle. I envision one of these before you get there:
- pack will be replaced due to failure or
- it/something will expensive will fail and it makes no economic sense to fix it or
- the vehicle will be in an accident where the damage is too expensive to fix

 

[Physicslawyer]

I doubt you will make it to 500K miles either on your original pack or still have your vehicle. I envision one of these before you get there:
- pack will be replaced due to failure or
- it/something will expensive will fail and it makes no economic sense to fix it or
- the vehicle will be in an accident where the damage is too expensive to fix

We have a 2007 Prius that made it to 500k and needed a battery at around 495k. The battery replacement was 3k at Toyota. The car needed brakes twice during that time and maybe 1k of other work plus spark plugs every 120k, oil changes, and some fluids. We still have the car and drive it.

I'm incredibly curious to see what happens with the high mileage MY/M3. A YouTuber has a 200k M3 with the original battery.

Our MYP started with 303 miles. After 5k miles, I can charge 100% to 296 miles. So, 2.3% in 5k miles. I drive 50k miles per year. I hope I don't lose 23% in my first year and continue at that rate.

My plan is to swap Teslas, instead of testing the limits and dealing with 20k batteries and 10k drive units and other costly repairs (control arms, heat pumps, and who knows what else).

 

[e645824]

At 10 years 500k miles, I think your battery capacity will still be usable, whether its 15% degradation, or 30% degradation. Your issue will be paying for all the other stuff that is likely to happen piling on those type of miles.

I realize fully that anyone putting on those kind of miles is likely putting mostly highway miles on them, but I still think the rest of the car will have enough issues for you to not want to fix them, before you get to 10 years 500k miles.

I have a separate question for you. I doubt you started piling on those miles right when you bought this car, so what car were you piling them on before, and how long did it last / how much did it cost to keep it running?

I agree with jjrandorin. My 2021 MYLR replaced my previous 2006 Infiniti M35. It had 375,000 miles on it at the end of those 16 years. Driver's seat was ripped (due to the perforated heat/cool heats), several plastic aero body panels were loose (reglued/rebolted several times), the plastic liners in both front wheel wells were gone, plastic skid panel was gone, and the styrofoam between the front plastic panel and the metal bumper was gone (it partially fell out; tried putting it back but it wouldn't stay so I just removed it). And the clearcoat starting peeling off at 300,000 miles. Likewise, one of the valves was cracked (so raw gas goes out the tailpipe) and other numerous engine-related problems. But the transmission still worked great!

So my MYLR battery might make it to 500,000 miles (with my driving that's about 21 years) but other things on the car will fall apart first. However, with a Tesla the cost/replacement dynamic is different than an ICE car. In my Infiniti there were lots of mildly expensive items to fail. But in my MYLR, there's the battery, the motors, and the inverters/controllers. Everything else should be cheap. Then the question becomes if to sell/scrap the MYLR with its still valuable battery & etc. and buy a new vehicle, or just replace the broken cosmetic piece-parts.

Scott

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MYLR | Red ext | White int | 19" | 5 seats | tow | no FSD | made/delivered Oct 2021