No, I am comparing it to what other people have been reporting on this message board. Since my in-town driving is almost zero, I am assuming most other people have more in-town driving than I do. By average of an oil change in less than 9,000 miles on average also seems to place my vehicle at or near the bottom of oil change intervals. Hence my comment "it is beginning to look like the CBS thinks high-speed highway driving is harder on the diesel oil than in-town stop-and-go driving," which is quite a distance from being a definitive claim or conclusion.