The lab was Western States Caterpillar. Newest test on the left column. Factory fill on the right column. https://lh3.googleusercontent.com/s...
The only noteworthy thing about the factory fill, IMO, was that it had sheared to a mid 20-weight in only 750 miles. The recommended viscosity is 10w30 and I assume that's what the factory-fill was. Shifting and clutch engagement was significantly smoother with the Delo and stayed smooth throughout the interval. I'm surprised that the Delo, too, sheared to a mid 20-weight; all the more surprised since the starting viscosity, according to the spec sheet, is 11.9 cSt--near the upper range of 30-weight. Despite this, I'm happy with the Delo 400 and I think I'll stick with it. I'm thinking of extending the interval out to 8000 miles. Honda recommends an 8000 mi or 1 yr interval.