hello everyone
please advise which oil grade is ideal for my toyota altis 1.6 2016 model. i bought it from toyota sure and its mileage was around 62000. since then they advised me to put petron 20w50 in it every 4500-5000 KM which i have been doin. but recently someone told me that the as per manual i should go for 10w30. please advise if i should shift to 10w30 oil grade and do i need to use liqui moly flush before doing so? also advice if anything else needs to be checked before switching the oil grades.
TIA
