This does not mean that one engine tends to "sludge" more than another. The difference is the recommended oil change interval. In about '99 when MB put forth FSS and free oil changes during the warranty period, they experienced the same thing with most all their engines if dino oil was used.

The cure to see that your car, regardless of make, does not experience this is VERY simple. Just change the oil more frequently than the factory recommends. Oil and filters are CHEAP compared to new engines or new cars.

'Nuff said,