I had to use my torque app today to clear some trouble codes on the 2015 Spark and needed to go out for testing purposes....you know, to make sure everything was alright. I did a total of 6 runs on flat ground, with a full battery, and torque capturing numbers. I hit 7.3 twice, 7.4 three times, and 7.5 once, don't recall any tire spin on any tests (factory ecopia tires), pavement was dry. My Spark has 17k miles, the battery capacity has shown right at 16.5kwh in the 3 weeks I've owned it and according to the dash, it pulls 120kw when more than ~50-60% full (may be a future test to check power available at different SOC).
2015 Spark EV w/ DCFC 48,XXX miles
Purchased 1/20/18 w/ 16,5XX miles
0-40k mile efficiency avg - 5.3 mi/kwh
2019 Bolt EV w/ DCFC 73,XXX miles
Purchased 3/16/19 w/ 87 miles
Lifetime efficiency avg - 4.8 mi/kwh