rt138DATA & SPECIFICATIONS RT-138 Issue 1, Page 11 13 Cylinder oils of excessively hh BN for the fuel sulphur can lead to excessive piston crown deposit accumulation. Piston crown deposits need to be carefully monitoredMassDOT spokesperson Jacquelyn Goddard confirmed the revised project scope for Route 138 in Raynham, saying the location of the water main was found to be different