my humble advice is that if you really trash your engine or drive long distance or always stuck in jam, use oil with higher viscocity . for eg i use castrol edge sport rating 10-60. i drive to kl once in a while. oso stuck in pg jam once in a while.
so far all these while never have to top up oil even thought my top gasket already leaking out some engine oil.
oso 10-60 ensure extra power when driving hard or long disyance. you can always ask your mec. they can confirm these.