MYLR range test at 63 mph and 73 mph - ~15% loss

[PStreitSV]

Tesla Model Y, LR, less than 2,000 miles on car, picked up on 3/31/2023

Route: about 8 miles each way / round trip, about 16 miles - the same route each time
Tested at two speeds: 63 mph and 73 mph
Used autopilot on both runs (except for exiting / entering highway)
Heated interior at 70 degrees, external temp shown on each screen (attached)

@ 63 mph, projected range was 234 miles (@ 66% battery) = 355 miles projected range (0-100%)
@ 73 mph, projected range was 180 miles (@ 60% battery) = 300 miles projected range (0-100%)
Only 10% off the EPA range @ 73 mph

15% reduced range from 63 mph to 73 mph

Note: exiting highway always reduced final Wh/mi (2 times), entering highway only shows one time (trip was over 15 miles)

 

[yellowr6]

So pretty much. Just follow speed limit and u will hit EPA.

from my testing, even over 5-10 mph, u can still get close to EPA.

goal is, hit 250 ish wh/mi and u will absolutely EPA.

 

[PStreitSV]

For long trips, looking to get there faster - so seems like 70-75 mph is not so bad on range without adding a lot more charging time.

 

[yellowr6]

I find 68-75 is a good speed. Without getting a ticket or scaring the family.

im happy with 270-290 wh/mi.

250 wh/mi is not hard to keep up but u really need to be gently on the pedal.

 

[JohnB007]

Once in a while, when I feel my charge is too close to get home, I just take rural highway instead of major highways for the last 40km or so. Speed-wise, that's 50mph instead of 78mph.

That saves few dollars at the supercharger, and since I don't charge, my arrival time is still about the same...

 

[boulder.dude]

To get EPA, don’t drive in rain, headwind, or cold weather.

 

[yellowr6]

just got back from a solo day trip to Yosemite. Drove there at night and came back in the late afternoon. Night temp was 50-60 with fan on. Day time was 80-90 so AC on 3. Going 60-70 mph avg, 70-75 to pass semi. Standard mode. I have on 19" martian wheels with Michelin Pilot sport 4 Summer tires with 18k miles.

Drove 444 miles RT and avg 242 wh/mi.

Noted 82 kWh (total pack size), I hit 350 mi!

 

[YW555]

I'm averaging 250wh/mi in the past 7000 miles thanks to traffic.

 

[jjtdmd2003@yah]

When I look at my trip meter I get similar results, but it seems to be lying to me. Just completed a round trip of exactly 100 miles and used 25 kwh which translates to 4 mi/ kwh. Fantastic and spot on with EPA estimate. This was at 60-62 mph on 55 mph highway that most were driving 65. Mostly cruise control. Here's the problem: I started with 62 kwh and finished with 29 kwh. That means I used 33 kwh NOT 25, reducing the miles per kwh to 3 from 4. Ouch. So which is correct and did I just go from 330 miles to 240 driving very conservatively? Has anyone else noticed this? This makes a huge difference traveling.