Riffraff Diesel Technical Knowledge Center

Opti-Lube Winter Anti-Gel Diesel Fuel Additive

Opti-Lube Winter Anti-Gel Diesel Fuel Additive

Oct 16th 2026

Cold-weather diesel problems usually start at the fuel filter. As temperatures fall, paraffin wax naturally present in diesel, begins forming crystals. Once those crystals get large enough, they can r … read more
6.0L Fuel Filter Set for 2003-2007 Powerstroke

6.0L Fuel Filter Set for 2003-2007 Powerstroke

Sep 22nd 2026

The 6.0L Powerstroke fuel system uses two filters: a primary filter in the frame-mounted HFCM and a secondary filter on top of the engine. It's good practice to service them together.  Riffraff D … read more