Liqui moli is a big brand and trusted one, i would recommend this over others...
i have tried valvoline which is the best oil but unfortunately hamare logo ko ye hazam nahi krne dia dealers logo ne....,
regarding cvt oil change...it does not cause any issue if you change it before intervals...i have done so and i know it...
ow 20 would be best in case if you dont find it then go for 5w 20
let me share another experience with you, a friend of mine imported 4 grade 660cc alto with 12000 km on board..and he has been using 20w 50 since 6 months and so far no issues....whereas this grade is meant for older cars or with weak engines...