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Both are manuals, yes. The 528i is actually a Touring, which is rare to find with a manual. I've had the 325i since 33k miles and the 528i since 55k miles, and both have been very, very reliable. I did do preventative maintenance on the 325i cooling system long ago... water pump, expansion...

Thanks to all for the replies. I've decided to keep it simple and cheap and use Castrol EDGE 0w40 for both cars. Should keep them happy for many more years. The '94 325i only has 81k miles and the '99 528i only has 106k. Thanks again.

Hi all, I have 2 older BMWs ('94 325i m50tu and '99 528i m52tu) and I'm a bit out of date on my oil knowledge, so I'm posting to ask for some advice. Previously I've used: 325i => Mobil1 0w40 (LL98 I think) => Sunny day car, autox, rare winter day driver 528i => BMW 5w30 (LL01 I think) => Year...