We ran Delvac at the LTL trucking company I retired from and had a chance to see what kind of service it provided with extreme mileage OCI’s. Some of them far in excess, I’m sure of recommendations, with no issues. I saw the cleanliness it provided when the overhead would be run and the decrease in DPF issues when they changed to Delvac from Castrol Tection. It was a mixed fleet with Cummins, Cat, Mercedes and Detroit. Worked well in all of them.