Last summer's best number was 8.5l/100km (27.6mpg), break-in driving style, ~65% hwy, followed traffic like a trunk (was on ins. discount monitor program for 4mths, so no quick stop and acceleration).
Winter number sux!
Current summer, best 9.0l/100km (26mpg), ~65% hwy, less traffic due to covid19, beyond hwy speed limit (it is too quiet inside).
Comfort mode yields a small improvement over Smart mode. The number is from the carputer, it beats Hyundai's number, I'm happy.