[Ishler]

The ULSD has been in this area for a year and I haven't heard of any issues. I have always used a mixture of 50/50 Power Service and Marvel Mystery Oil (1/2 qt per tank) as additional injector lubrication. I was in the dealer service department today and asked if they had seen any issues because there were reports of fuel gelling in school buses in cold weather. He said they haven't seen any problems and the gelling was a result of an additive used by the school districts in their storage tanks. Last I knew the USLD was approved for use in pre-2006 engines.