Diesel Engine Overhauling

[Ry_Tower]

Thanks, yes. I checked my last oil change and I'm still using 15w-40. What does it mean if if I use 15w-50? What brand do you recommend?

For older engines kasi recommended yung mataas ang rating para mas malapot and better for the clearance. Pero ok na rin 15w40 eh. Mausok na ba? Low FC na? if hindi pa naman, not yet worth top overhaul IMO.