What are the consequences of using Low Sulphur Diesel (LSD) in a Canadian or American engine built after 2006?
This is likely the most controversial topic amongst RVers with diesels on Baja. We have spent endless hours discussing this with experts, manufactures and owners. In summary, this is a warranty issue and really not a performance or operational issue. The difference between diesel vehicles sold in Mexico and the US & Canada are the exhaust systems, the engines are identical. We have encountered many 2007 diesel vehicles, including brand new RVs and trucks on Baja, who happily report no problems whatsoever with the fuel. We are told by Diesel Techs running 3000 or 4000 km of LSD is of little consequence for a ULSD engine (however 35,000 km straight may be) and many operators simply their change their oil and filters when they return to the U.S. We know first hand that some manufactures will take the first opportunity to void a warranty if they are made aware of the use of LSD in a ULSD engine (although this seems specific to Mexico not the US). We have also learned that using LSD in a GM
