Tom, We have a fleet of 70+ CAT powered D pushers from '90 3208's, 91-98 3116T's, 3126B's and E's, and C7's. We switched over 4 years ago to Delvac1 from 1300S and have gone out double what we ran with the 15W40. Even with 1300 Super, a 24 qt BB AA should get ... Login to read more.