Those cars must have been fueled with pure junky diesel!

I ran my prefilter over 1.5 years and took it off only to find it had not even a few flecks of stuff stuck in the screen, it had just gotten dirty on the outside! (I washed it off to find this out!)
My new one (been in for 4-5 months so far) is still crystal clear after over 4.5k miles, nothing in the screen......buy at high-volume stations!
Also, I've been using the same secondary filter for over 2 years, and I can still roar to 100+ mph no problem, fuel is a-flowin fine.

I'll bet there's practically nothing in it....maybe I'll change it next summer just to see whats in it....
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-diesel is not just a fuel, its a way of life-

'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)