Actually it depends on the filter you using. Oil last much longer than 5000k but if it becomes dirty due to poor filtration then it does not get it's full use. Engine oil analysis show that even the good old dyno oil is good for 10000K to 12000k with a quality oil filter. That's the factory recommended oil change interval on most new diesel in the US. Fuel quality in the Philippines hampers that a little bit but 10000k with a good filter like Baldwin or Fleetguard is easy. Changing it at 5000k is wasting money.

Of course if your under warranty your stuck with the dealership OEM filter. There a big difference between a filter that is 98.7% efficient at 40 microns vs one that is the same efficiency at 20 microns and one that can hold 2 to 3 times the grams in dirt and that is still 50 percent efficient at 12 to 10 microns is a huge difference.

Get a Fleet filter they are designed to extend your oil change intervals and save you money on oil changes while having much better filtering. But if you have a canister filter your out of luck and stuck with OEM.

But if your stuck with Casa service until your warranty expires go with the best oil you can get, like Motul, Redline, Royal Purple, Delo, Mobil Delvac, ect. Only use oil that has a API rating don't cheap out.

Plenty of oil information on the bypass filter thread we cover it in depth.