u shud complain to we.care coz if i not mistaken, cvt supply by punch only need to change the oil n filter for every 60k km. N please check also the type of fluid they using, hopefully the correct one.
i dunno whether thay had change the policy coz as far as i remember, its 60k as stated by punch.
10w 30 is almost all major co recommended for modern engine. U still can use 5w 30@ even 0w 30 coz both are sae 30 rating. The 1st is normally refer to winter rating@ at common known as how thick@thin the oil during cold start. The upper number on the other hand how thick@thin the oil can be when it heated up to normal operating temperature or even under extreme condition. Unless u r kaki pecut, sae 30 rating is suffice enough, unless u always red line kind of guy, then sae 40, 50 or even 60 is better. For normal engine n kaki pecut, sae 40 is enough. Unles high power engine like vw gti, evo,imprezza, ferrari n etc need beyond that, that is if its driven hard every day. If using higher sae, the bad things is that it is thicker, which means heavier. For cfe@iafm+, isnt recommended coz it will effect fc n performance.
But the first number@winter rating shud be atleast 10w. If using lower than that, its ok, but higher than that, isnt recommended coz thicker oil during cold start will cause hard to start, engine need to work hard, n for vvt equip engine, the oil takes time to bath the vvt component, which can lead to unwanted sound coming from vvt during cold start. The lower number cons is that its expansive than 10w, n for older engine that already eat the engine oil, u need regular top up.
So, its up to you, but since u can use cheaper 10w 30, why need to spend more? But if u need to use fully syn oil, make sure its around 10w 30, 5w 30@even 0w30 which is really expensive. For petronas, that is syntium 5000. U can get 5w30 from petronas in form of syntium 3000, n its also has 5w40 for the same range. 0w 40 also available for syntuum 5000.
For me, personally, i used 5w30 fs oil for one of my car, n 10w30 semi for another one.