I run the redline in every tank on my M103.....about 4oz per fillup....and its been running perfectly since I got it hooked on the stuff. It used to hesitate and idle rough, now its smooth and happy. Bought in cases of 12 the SI-1 isn't that expensive on a tank by tank basis. Less than a dollar.

__________________
-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)