Update. I have been using the Shell T6 Rotella for 2 months with no oil related problems. My oil level is constant. So, I believe that I did not lose any oil or atleast enough to make a difference. When I change my oil then I will measure to see how much of the 6.5 quarts drain out. All and all, I have no complaints about using Shell T6 Rotella in my FX45. Note: I did notice that the T6 oil still has an amber color when I checked it recently, the Castrol Syntech would be black about this time when I check it. Just an observation.








