Oil for Gasoline & Diesel Engines: Properties

Hi everyone,

I have a question about long-life oil:

Ideally, a (relatively expensive) multi-purpose oil meeting the specifications 50300+50600+50601 is used, as it can be used in almost all longlife engines, whether gasoline or diesel. The exception might be the W8/W12 engines, which require the 50301 specification.

What I'm curious about is how this oil manages to reconcile the extremely conflicting requirements of gasoline and diesel engines. Gasoline engines tend to cause oil dilution, while in diesel engines, the oil tends to become thicker over time due to soot contamination.

It is clear that this oil will have fewer problems with diesel engines due to its low base viscosity and reduced HTHS. But how does it perform with gasoline engines?

And how can chemistry fulfill these fundamentally different requirements in the same oil?
Or have I simply overlooked the dip switch on the bottle ?