Thanks for the replies. I’ve got about 3 million miles logged with mostly diesels. Never an issue. I’m no stranger. Even my current 3.0L Powerstroke could care less when it’s -15 out. I just find it weird that both BX’s seemed to be the common denominator. I plan to grab some kerosene tomorrow and add it to the tank if it’s going to stay this cold. As long as I have this BX, it may need to be the standard for winter. Tgg he ani’s again.