Will ULS fuel provide enough lubrication to prevent mechanical problems in current and new engines? What about seal elasticity?
The new, ultra-low-sulfur fuel will continue to have lubricating qualities because of the new provision of the ASTM standard that includes lubricity as a requirement. To make sure of fuel quality, truck owners can request from the fuel supplier a certificate of analysis of the fuel that proves that lubricity was measured and it meets the ASTM standard. Seal elasticity issues are not anticipated, since this fuel change does not involve significant aromatics changes.