Originally Posted by motordavid

PT, if your question is directed at me, I currently run the "euro" Mobil One 0W-40 for the past 18 months, (two changes)...

When we spent real winters, back on the mtn for the first 4 years of our X's "life", I ran 5W-30 syn in winter and, 5W-40 syn with occasional 15W-50 syn, in summer. I have never had an oil seperator issue. My cap looks clean and the beast still runs like a top with 64K miles and 6 1/2 yrs old.

Since we "winter" here in Naples, FL the past 3 winters, it's academic; still have last fall's change of the 0W-40 euro Mobil 1 in the crankcase.
BR, mD