I'm of course going to run this by a BMW service center, but I wondered what kind of input I'd get on a forum.
Picked up a Z4 3.0L in Feb, ran through the whole break in period (under 5,000 rmp, under 100mph), then took it on a trip down the East Coast (for St. Patricks Day, about 2,500 miles round trip). Had the yellow oil light turn on about 1 week after the trip, didn't have any BMW synthetic, so added 1 quart of Mobil 1 synthetic.
Ran it down the East Coast again last week (same trip). Yellow oil light again, had to add another quart of Mobil 1 synthetic.
Should I be burning this much oil in 7,000 miles? Granted, since breakin, I've been driving aggressively, but...
Also, should the idle be 100 percent smooth? Idle seems to rise and fall when cold or when hot...never loses power, but...
any advice would be appreciated.