FIRST: make sure your 325i Actually has the GM6 transmission. I don't know about the Rest of the World, but the 325i sold in US had the ZF 6HP19 AT.Please suggest me the fluid used in E90 325i GA6L 45R Automatic transmission or its equivalent oil
Valvoline is unfortunately not regarded among general population as top notch product, which absolutely it is. Their gear oils are fantastic.I like Valvoline Full Syn Dex VI (6) as I get it for $2/quart.
Redline is my second choice if I'm feeling generous.