Hard to know because the Platinum DEF contains a proprietary ingredient that is supposed to reduce deposits from the CAT, but there is no description of what the ingredient contains or how it works to reduce deposits. All approved DEF meet the same standards for purity and concentration, so only their special ingredient is different.
I don’t know enough about DEF usage to even comment on whether or not deposit build up is an issue, let alone an issue in a RV, but the marketing department thinks it is.
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.