[Sphere]

I’m getting 4.9 mi/kwh right now
I drive in D, use mostly the paddle for stopping.
Here are my mods:
-Michelin energy saver self sealing tires
-45 psi on all four tires
-Fast EV01+ wheels
-Hitch mounted trunk modified to sit closer to bumper.
-Ecohitch with gussets added to frame
-Battery recall (helped range, not mile/kwh)
-Vehicle reported average speed 27.7 (this is the average speed for entire time the vehicle has been running while the average was being calculated, Idk when last I reset this, maybe 10-20k ago) I usually go 55-65 on highway. And it still produces this average.
-location arizona

before hitch mounted trunk: (observe mi/kwh)

after hitch mounted trunk: (observe mi/kwh)

Edit: 1200 miles approx on average calculation and I am at 5.0 miles/kwh now. Much of this trip was a drive between Vegas and Phoenix, so lots of highway speeds.

 

[evtinker]

Have you seen any effects on traction, handling, or tire wear running 45 PSI? Over 161K miles, how many before you got the new battery?

 

[Sphere]

I got the new battery at 150k

handling and wear seem fine. You can hear the road/tires more. But whatever.

 

[phuber]

Could you post a picture of your hitch box? Have you done anything else to improve aerodynamics?

 

[MisterJJ]

Gawd, why are all these rolling road blockers in Arizona. 🙄

 

[Sphere]

When I get a chance I’ll grab a pic.

here is what it looks like.

STOWAWAY MAX DUAL HITCH CARGO BOX (BLACK) ST 024.3 TRAVEL 2

StowAway MAX Hitch Cargo Carrier with Frame Our MAX Hitch Cargo Box is StowAway's largest and most popular hitch carrier. And with 16 cubic feet of functional space and up to 200 lbs of gear capacity, we can see why. Molded with the same durable polymer used to mold white water kayaks, the MAX...

store.waldoch.com

 

[Elaine R]

or you could move to western North Carolina, where I am averaging 5.6 just because the weather got better.

 

[Boltmobile]

There is lot more that can be done to increase range starting with shaving weight (removing the rear headrests, seats and all the mats in the trunk). Michelin energy saver tires are heavy because of all the goo that is inside which means that you can find more efficient wheels and tires (usually smaller wheel diameter with higher profile tires). Side mirrors on the Bolt are big compared to the one on the model Y for instance which lead to more than necessary drag. You can also lower the suspensions.

 

[Sphere]

Gawd, why are all these rolling road blockers in Arizona. 🙄

Huh?

or you could move to western North Carolina, where I am averaging 5.6 just because the weather got better.

what is your average speed and distance traveled over that average?

 

[Sphere]

There is lot more that can be done to increase range starting with shaving weight (removing the rear headrests, seats and all the mats in the trunk). Michelin energy saver tires are heavy because of all the goo that is inside which means that you can find more efficient wheels and tires (usually smaller wheel diameter with higher profile tires). Side mirrors on the Bolt are big compared to the one on the model Y for instance which lead to more than necessary drag. You can also lower the suspensions.

Can you post your results? Average mi/kwh and average speed meterics.

smaller mirrors would be cool. Are there any from other model vehicles that would fit?

I cary around a whole bunch of extra weight with me. All sorts of tools cords and crap. Haven’t done any weight savings.

I’d be interested in actual data on the weight thing. Weight affects gassers more because of stop and go losses. Where as EVs less because of the regen.

 

[Elaine R]

Huh?
what is your average speed and distance traveled over that average?

I am not a speedster, which is good, as the roads are really curvy here. I do several short trips and a couple of 60 mile trips a week.

 

[Brad]

Good job. I hyperemile some, but am not able to get high numbers. When I got the car it had normal tires on it, and the range is bad because of that.

 

[Elaine R]

I still have the original tires. There are some threads here with recommendations for replacements that last better and have decent mileage. In winter I was down to 4.2, fwiw.

 

[Sphere]

I am not a speedster, which is good, as the roads are really curvy here. I do several short trips and a couple of 60 mile trips a week.

I meant, what does your car say.

here is the requested pic.

so has anyone come up with a tire that is better? These oem michelins with self sealing seem hard to beat. The self sealing is pretty handy tbh and worth whatever losses it brings imho.

 

[micantony]

-Fast EV01+ wheels

Did you go with the 16” or 17”?

 

[Sphere]

Whatever stock is. I forget what that is.

 

[KyleBrightman]

so has anyone come up with a tire that is better? These oem michelins with self sealing seem hard to beat. The self sealing is pretty handy tbh and worth whatever losses it brings imho.

I’m not sure how good its LRR properties are, but I believe the lightest tire in the factory size is the Hankook Kinergy ST (19 lbs). That is quite a bit lighter than the Michelin Energy Saver AS Selfseal that comes on the car (23 lbs), and from a rotational inertia standpoint that extra weight is in the worst possible location (on the backside of the tread - furthest from the axis of rotation).

 

[RacerX00]

For argument's sake I've done the exact opposite and gone with Summer/Winters on the rubbers while throwing fuel efficiency completely out the window. I'm all about efficiency but rubber is not a place where I'll make that sacrifice because to me, personally, that's a safety thing.

I'm waiting for my EUV to dive into the summers but on the Kona (similar size, battery pack, efficiency, etc.) I went from stock, lowest rolling resistance practically on the market to a very aggressive (but still decent rolling resistant) summer tire and the change was imperceptible range-wise while completely revolutionizing traction (the Kona stock tires are far worse for traction than the Bolt stock tires). Side by side comparisons by others show no more than 5% max difference.

I kind of view this as the best of all worlds. People who need the range can squeeze those last little bit of % out of it while if you want to go for traction the sacrifices are livable.

I'll try and be conscious of all of this when I pick up the EUV and switch to summers, I'll try and be more scientific about logging the before and after and report here.

Worth noting that I also went from stock aero wheel to a Sonata, not aero rim (pictured below)

Original (now sporting winters, also those are temp license plates registered now to an Escape not owned by me, so copy them all you want!):

New:

 

[KyleBrightman]

I’m absolutely with @RacerX00 on the no compromises on traction when optimizing range or efficiency. That is why I accept the 15% penalty that goes along with my CrossClimate2 tires.

 

[RacerX00]

I’m absolutely with @RacerX00 on the no compromises on traction when optimizing range or efficiency. That is why I accept the 15% penalty that goes along with my CrossClimate2 tires.

15% seems like a lot. That would be almost 40 miles on the Bolt. Did you measure that loss?