Hello all! I’m having a new 6.0 Powerstroke built. I consulted the builder about break in oil and they said they only recommend Motorcraft 15w40 or Rotella of the same grade. Every other builder I’ve researched require a diesel specific break in oil to comply with their warranty. Am I doing myself a disservice by not using the break in oil? In case it matters, the engine is being built with coated pistons and bearings…