I think, the manual is either not up to date, or the people who vetted / verified the manual for Pak Suzuki, believe in "Mota Tail" myth and accordingly, recommended 15w-40 engine oil for this 1000 cc engine. It will always require 0w-20, 5w-20, or at max. 5w-30 engine oils, provided they are used in normal driving conditions, and irrespective in Pakistan or Alaska, or USA, Gulf, etc.
And regarding Total...
No offense taken brother. The reason I recommend Total Quartz 9000 Future Series, Fully Synthetic in 5w-30:
- Shell offers 5w-30, but in semi synthetic locally.
- ZIC, Caltex, Havoline, Chevron doesn't offer this grade here locally.
- Kixx does offer 5w-30 fully synthetic, but Total is still better.
- Mobil1, Kendall, and especially Valvoline, Amsoil does offer it, but are quite expensive.
I hope, it clarifies. Thank you.