After 300 miles on my fresh change of Rotella 15w40, it's arguably lighter than the dark as night stuff that drained out after 3,000 miles...including 2 quarts of make up oil. I'm sure at my next fill up when I check oil it will be dark as night though!
WD8CDH, you have me thinking about trying a longer drain interval on Rotella Syn. A used oil analysis is always interesting, especially when I have no idea about the mileage of the motor.
..if only changing oil on the 616 wasn't the quickest and easiest of any car I've ever owned...and the W123 has so many great spots to rest your tools and your beer under the hood...
74 914 2.0, carb'd, flared
86 300D Euro Auto
82 240D SOLD
83 240D Euro 4spd SOLD