using good quality oil (generally liqui molly) seems to be very much recommended.
I use liqui-moly 5w50 green stuff supposed to have better wear protection and I also add cerratech to it.
Liqui moly, 5w40
Liquimoly is by far a better 5w40 to put in a bmw.
I used OEM, Motul, and LiquiMoly oil. The only one that seemed to do anything with oil consumption was the LiquiMoly. I changed the oil every 5k miles and I had similar experiences as you until I did the LiquiMoly. Completely anecdotal, but I’m a believer. Been using it ever since.
Random guy who works on these cars here, change it at 5-6k regularly. Ignore the casuals here who don’t work on these cars, and especially Ignore the factory recommended interval. Your engine will last much longer, you’ll reduce wear on the timing chain, turbo, as well as other components. You’ll also reduce the chance of your piston rings getting glued together with carbon creating excessive oil consumption. Just change it. I recommend liquimoly oil.
5k or less with Liquimoly. Just had oil pan and upper timing cover replaced at 123k miles (plastic parts leak/ fail bc of heat cycles) and my timing chain looked like new, and not one spec of metal or debris on the bottom end. Unitronic stage 1+ since 75k miles.
My local shop in Canada does it for $125 plus tax and uses liqui moly oil.
Liqui moly is the best stuff in the market! I have been running it in my ST for years. It runs better and has lower oil temps than motorcraft.
I use 15W-40 Liqui Moly Touring High Tech mineral oil. The filter you buy from BMW is made by Mahle so I would suggest that.
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