Should to change engine oil from 5-30 to newly introduced 0-20 in new cultus after 20000 km running in summer or stick to 5-30 Suzuki genuine oil.
What its manual say about?
The manual probably says 5w30 right? No need to go for a thinner oil, it will be detrimental in the long run.
Go for it
Switch to 0w-20 as manual recommends 0w-20
