I used the Walmart version (Syntech) of 2 stroke in the 2007 Dodge 5.9 CTD for two years. I tried Amsoil, Standyne lubricity and Performance formula but my truck got better mileage with the 2 stroke. I currently have a 2011 Ford F 250 with the 6.7 and I'm using Motorcraft additive and Optilube. I would like to try the 2 stroke in the new truck but I just don't have the nerve yet with all of the emission garbage on it. I've read that all of the 2 Stroke is burned but I just don't want to risk it.
