In Reply to: First oil change question... posted by scott on February 26, 2001 at 06:34:37:
After talking with folks years ago who rebuilt engines for a living and repaired many almost new ones, their biggest problem was metal particles and other very fine particulates. Although BMW runs in new engines more than most other car makers, I still think the engine oil should be changed often the first 5000 miles.
I change oil and filter at 200, 800, 2000, then at 5000 miles with a new car engine. Then every 5000 miles thereafter. Oil being the cheapest thing one can put in an engine, I don't mind a bit. A BMWCCA member can get BMW synthetic 5W-30 oil for less than $3.00 a quart; this is oil that meets the toughest lubrication standard on earth - the ACEA A3 standard for gas engines. Made by Castrol, it's probably the best buy for your money for Z-car engine oil these days.
Valvoline used to sell their 5W-40 synthetic oil to BMW, but this ACEA-A3 spec. oil isn't any more. It's still a good oil for Z cars, it just costs more than BMW's 5W-30 oil.
Mobil 1 0W-, 5W- and 10W-30 oils don't meet this standard; their 15W-40 does. Neither does any other synthetic oil in XW-30 weight except Amsoil (I think, but it costs over $5 per quart and is a very good oil).