Data · Efficiency tests · Test #1
Efficiency Test #1: Stock Configuration (stock wheels)
2026 Tesla Model Y Standard RWD (Juniper)
A baseline for the series: the car as delivered, on stock wheels, on a highway trip at 23°C (73°F). Figures are read straight from the car's Energy app.
Later tests will change one thing at a time, such as wheel covers, and compare against these numbers.
Conditions
- Outside temp
- 23°C
- 73°F
- Cabin temp
- 21.5°C
- 71°F
- Wheels
- Stock wheels
- Driving mix
- ~75% of km at highway speeds
- Driver assist
- FSD (Supervised) for the majority of the drive, Standard mode
- Date
- Oct 2026
Source: Tesla Energy app, trip after the first Supercharging stop.
Highway trip (after first Supercharge)
The drive after the first Supercharging stop, as shown in the Energy app.
Distance
271.5km
169 mi
Energy used
36.6kWh
- Wh/mi = Wh/km × 1.609344. MPGe uses the EPA’s 33.705 kWh per US gallon of gasoline; Le/100 km uses NRCan’s 8.9 kWh per litre of gasoline.
Estimate
Estimated range
100–0%
≈ 445km
≈ 277 mi
60 kWh ÷ 134.7 Wh/km = 445.4 km
Road trip: between Supercharger stops (10–85%)
≈ 334km
≈ 208 mi
75% of 60 = 45 kWh ÷ 134.7 Wh/km = 334.1 km
In real-world road trips you rarely run to 0% or wait for 100%. Arriving around 10% and leaving around 85% keeps stops short, since charging slows near full. That gives about 334 km (208 mi) per leg.
Estimate only: 60 kWh battery ÷ this trip’s 134.7 Wh/km. Based on this trip’s conditions (23°C / 73°F, stock wheels); real range will vary with speed, weather and load.
Charts
Efficiency
134.7Wh/km1
≈ 217 Wh/mi · ≈ 155 MPGe · ≈ 1.5 Le/100 km
Wh/km by test
Supercharging
Two Supercharging stops, with figures as shown in the Tesla app’s charging history. The first, in Scarborough, happened before the long test drive started; the highway trip above began after it.
First Supercharging session (Scarborough)
6780 Kingston Rd, Scarborough, ON
Start %
46%
210 km range
130 mi
End %
83%
379 km range
235 mi
kWh added
22.0935kWh
Charge time
15 min
- Covered by Tesla’s 150 km (93 mi) free Supercharging credit for new owners (110 km / 68 mi used here; the remaining 40 km / 25 mi went to the Kitchener session).
Second Supercharging session (Kitchener)
663 Victoria St N, Kitchener, ON
Start %
37%
167 km range
104 mi
End %
100%
452 km range
281 mi
kWh added
37.8689kWh
Charge time
35 min
- The last 40 km (25 mi) of Tesla’s 150 km (93 mi) free Supercharging credit was applied to this session.
- Home cost = 37.87 kWh × Ontario off-peak rate of $0.098/kWh.
- Gas cost = 281.1 km × 5.5 L/100 km ÷ 100 × $1.6345/L = $25.27. Distance is what 37.87 kWh covers at this trip’s 134.7 Wh/km (37.87 kWh ÷ 134.7 Wh/km ≈ 281.1 km / 175 mi). Fuel use: 2026 Toyota RAV4 AWD LE, the base trim (every 2026 RAV4 in Canada is a hybrid with AWD), 5.5 L/100 km (≈ 43 US MPG) combined (NRCan 2026 Fuel Consumption Ratings). Price: average for Ontario regular unleaded, 163.45 ¢/L, the mean of 40 weekly readings (Ontario fuel price survey). Sources: Ontario motor fuel prices, Ontario weekly fuel price data (CSV), NRCan 2026 Fuel Consumption Ratings.