What type of oil to use?

Hi. My car is BMW 330i 2003year 55000km. Our climate is from +5 down to -6 Celsius in winter and +34-38 in summer. Dealer and some of friends recommends me to use 0-40W Castrol or BMW special oil with longlife-01 all year long. Some of guys recomed me to use even 10-60w castrol edge sport. My only question if my choose right or wrong with 0-40w castrol ?

Thanks.

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: BMW Oil Change

[Wayne 962]

Everyone has an opinion on oil - me too. Firstly, I would make sure that the Castrol oil has enough anti-wear zinc compounds in it. Newer formulations have cut this because of fears that the zinc may be damaging catalytic converters. If the oil doesn't have these compounds, then, you can add ZDDP additive to the oil when you change it. The zero-weight oil should be very good for you to run in the winter, and I would switch to a heavier weight in the summer months. The longlife oil should have the anti-wear compounds that are missing from the normal oil, so that will help too.

- Wayne

[jamin325i]

use what your manual says.