I've been following the BMS thread like a hawk since it was posted, but no luck yet. I did some pretty extensive troubleshooting with @AlanSubie4Life (there's a whole thread or so), and it looks like I'm ~8% or so degraded. I'm strongly considering upgrading back to SR+ to try to recapture some of my lost range.
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New tires killed my range (20-30% decrease)
- Thread starter lateulade
- Start date
Not odd at all, the rolling resistance effect on the overall resistance calculation should peak about at 45 mph. Going up, aerodynamic resistance takes place more and more on the total resitance.
It must be said that you should do some thousand miles on new tires to smooth the tires as they comes from production line, it will get slightly better.
But in any case, people should realize that rolling resistance effect it's huge, large tyres are critical and that you in USA should work to have the labels on tyres with the tyre classes as in EU:
But who tests for that? If this is just numbers from the manufacturers then it's pretty much useless.
regulators set the testing protocols. same way epa doesnt conduct actual testing, but they do define the standards
Dolemite
is my name
I think for stuff like treadwear it's fairly open-ended, and thus bullshit. I dunno. I've never cared enough to read into it beyond knowing that some specs are only useful for comparisons within the same manufacturer.
AlanSubie4Life
Efficiency Obsessed Member
This is actually not unusual for Model 3. Especially after 50k miles in an SR (~50% more cycles than an LR with same mileage!). I have 20k miles after two years in a Performance and I have about 7% proven capacity loss (measured discharge on a long continuous trip, and accounted for buffer). And it’s not like I am the worse case. There are plenty of people in the mid to low 280s.
I believe @lateulade has also measured discharge carefully in the past. It gets old after while. At least it appears his car did not keep losing miles - as I recall most of his loss was when the car was just a few months old.
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Knightshade
Well-Known Member
FWIW I made this exact tire change.... lifetime on the MXM4s (bit north of 20k miles) was ~263 wh/mi
After about 1500 miles on the Pilot Sport All Season 4 I'm at about ~284 wh/mi
An increase in consumption of about 8%. I imagine it'll adjust a bit as the mileage goes up... but 20-30% certainly seems high from JUST the tire swap.
(Car is LR AWD+ BTW, and my driving is like 90% or more highway at speeds in the 75mph range +/- a bit)
After about 1500 miles on the Pilot Sport All Season 4 I'm at about ~284 wh/mi
An increase in consumption of about 8%. I imagine it'll adjust a bit as the mileage goes up... but 20-30% certainly seems high from JUST the tire swap.
(Car is LR AWD+ BTW, and my driving is like 90% or more highway at speeds in the 75mph range +/- a bit)
Knightshade
Well-Known Member
Happy with them so far- Now to be fair I think nearly anything would be better than the MXM4s (in terms of handling/cornering, stopping distance, etc) but they're certainly noticeably better at those things (I've taken a few nice sweeping exit/interchange ramps a good 15-20 mph above where the MXM4s seemed happy doing so for example)
I was torn between these and the summer PS4s tires.... the objective test results between the two was "close enough" and it gets below 40 degrees here just often enough, that the (relatively) small performance difference seemed worth giving up to not have to worry about not being able to drive the car the few days of real winter we get here.
So far would say I'd buy again- though I guess ask me in another 20-30k miles to be sure
dhrivnak
Active Member
I also upgraded the tires from the MXM4 to the Cross Climate. The car does feel more planted but my watts/mile increased nearly 15%
Dolemite
is my name
For what it's worth, on the big battery, 75K Wh / 310 miles = ~242 Wh/mile. I use that number to somewhat benchmark my driving habits.
I was going to propose the same. I have them on my Model 3 (18 inch) and have not noticed any energy consumption increase, compared to the original summer tires. I drive them exactly at the prescribed cold pressure of 2.9 bar. So far I'm very happy with the change. They seem to be a bit softer in curves, but (a) this may change as the profile wears down, and (b) I don't care anyway. I'm not a racer. They are not noisy either. They sing a little bit, which fits an electric car nicely.
I agree with others though that more than 20% sounds difficult to ascribe to the tires alone.
One thing I haven't seen mentioned is that you can check your efficiency at 65mph, using ABRP. That way you can have an actual meaningful benchmark for your tire's efficiency compared to others. Mine is 235Wh/mile at 65mph according to ABRP, for a LR-AWD. Would be interesting to compile a list of these for various tires.
You only need to sign up, and have it calibrate for your vehicle. I boxed mine in red below. If you supercharge, it'll also give you some info on your car's deg. I have Vredestein Quatrac5. How does it compare to the OEM's? It seems about the same as far as I can tell. I don't have a comparable ABRP reading since I think this ABRP feature came out after I switched tires:
You only need to sign up, and have it calibrate for your vehicle. I boxed mine in red below. If you supercharge, it'll also give you some info on your car's deg. I have Vredestein Quatrac5. How does it compare to the OEM's? It seems about the same as far as I can tell. I don't have a comparable ABRP reading since I think this ABRP feature came out after I switched tires:
Vaillant
Member
Just to be sure, the replacement tires are the same treadwidth as the OEM, right? A wider tire also could impact the range.
FWIW, ABRP shows 232 Wh/mi @ 65mph for my stealth performance, with the original tires at around 16k miles. My lifetime efficiency is around 298 though. The thing that sounds more odd to me is how the OP has such great efficiency on the older tires... is SR really that much more efficient?
Knightshade
Well-Known Member
My general understanding was CC was a performance "ish" tire that can handle legit winter/snow--- and the A/S4 was a legit performance tire that could handle winter "ish" cold temps/rain/maybe light snow
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