Many times per day. Especially if I am going over 95mph.
My engine is sparkly clean, after 30k of no purge, I did one, and just about nothing came out in the stuff that went through, nor did it improve the performance any....which is excellent.
I drove 380 miles today going about 78-95mph, with a few runs topping 100....my mileage was: 25.4mpg
My engine is a smooth running beast, and it loves its straight pipe.
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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)