Bill, I drove about 1 Km and warmed up the engine to just over the 40 degree mark and I used 5W30 Mobile 1.
After my drive this morning, I have the impression the B likes Mobile 1. The engine revved quicker and effortlessly and the engine seemed to run smoother. It is subjective, but it seems there is less friction with this oil. If so, this may improve fuel economy a bit too.
