Your car's Engine oil

[hardwang]

an auto authority once said,
use cheap ordinary mineral oil and change it every 5000 km or 6 months.
replace oil filter every other oil change.
expect your car's engine to last 500K km or more.
use synthetic oil if you want to splurge.

Adding around P200 to P300 per liter every oil change by using fully synthetic oil is considered splurging?