Windage. Crank froths up the oil. Not good.

If you're looking for extra capacity, use an oversized oil filter. I'm using a NAPA Gold (Wix)# 51344.

Not to whore your thread, but here's a question... as per my owners manual, and everywhere else I've read, my b18b is 'supposed' to take 4.6L of oil. The mechanic who did my last oil change said, "no, it takes 3.8L, and with your bigger oil filter it'll proably take all 4.0L." And it did?! One 4.0L jug, filled it right up to the top of the dipstick. Strange, eh?