How to keep engine oil clean

[ptcb]

Castrol Magnatec. 10w-40

[mudski]

Castrol Magnatec. 10w-40

I use the same oil, Magnatec Diesel 15w-40 that is, and its perfectly fine whats happening.

[90mav]

A misled mate of mine who drives a turbo diesel 80 ran that 'cost effective maintainence' sludge cleaner through his 1HDT a few years ago at over 400000km and it stays clean between changes now. Not absolutely spotless but certainly not black carbony like mine does 10 minutes after a change.