hey guys, need some advise.....after reading your comments....

i am using 10W-40 castrol magnatec......got it from distributor of Castrol after I called into Castrol headquarters.....they gave me address of their distributor in Taman Sea or is it Paramount in PJ.......so this to minimize my chances of getting fake oil..........

just wondering if this is ok for my car.....its kia carens II......its a mini mpv I would say........my driving style can be considered non-spirited......RPM only goes to 2k or 3k before the car changes gear......mostly 2k+.......

i only rev it till 4k or 5k when cutting car using trunk road or going uphill like genting.......

so....just wondering if I should go for petronas fully synthetic of 10W-30 or 5W-30......or should I maintain at 10W-40........

using 10W-40 i change the oil every 5K-6K interval....

my mechanic says if I use the 10W-30 or 5W-30 petronas can change at 10k.........

so...which oild should I go for and change at which interval......thanks....

okie....thanks for the advice.....

oil filter for carens is rated at 10k km interval....

hmm....okie......but how about petronas brand? fully syn from petronas is good or not? of course assuming that its not fake la......