using 5w40 in my 16 Model swift since day 1.
Initially I used Liqui Moly 5w40 Synthoil High Tech (Fully Synthetic), Drain Interval 7500 KMs for approx 80,000 KMs (4 years)
Then I switched to Valvoline 5w40 SynPower (Fully Synthetic), Drain Interval 7500 KMs