Unfortunately no, Kah will be using their default Shell Synthetic which is a 5W30 if I'm not mistaken. They will make a fuss if you use a thinner oil but as long as you choose one within the types recommended in your manual I don't see how they can fault you if your car needs repairs in the future.
0W20 is hard to find in the shops though... Buy it outside and bring 4L to Kah (will save you $ as well).. they discard 0.5L I think as the HCH needs only 3.5L of the slippery stuff.
I will be getting mine from
www.mxtradings.com
Currently using the Schaeffer 7000 5W20 for the past 4000km with good results. But will convert to fully synth oil Mobil 1 0W20 at the next service.
www.fuchs.com.sg also has 0W20 GT1 oil. Very good in my previous car but more $$$.