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Interesting, I wasn't aware you could feel the drag of higher viscosity in the turbo response. I'm unsure what's in the car now, as the dealer I bought it from changed the oil before delivery and I haven't changed it yet (recent purchase). But this info has me leaning towards a 30. Thanks for...

Thanks, I've been running Liqui Moly - Leichtlauf High Tech 5W40 in my other BMWs for years, but was unsure about the weight in this engine. What do you prefer about the 30W (assuming you'll be switching back)? I saw some threads where people were recommended a 40 for tuned cars, and due to...

Yeah. Though I have owned 5 BMWs, this is my 1st turbo, and it's tuned at that. With the different weights and options here, I figured I'd ask people who know more than I do about oil.

I have a 2016 BMW M235i. N55 engine, 6 speed manual, Dinan Stage 1 tuned. Oil temps in the 210ºF to 215ºF range under normal driving, but I've seen it get as high as 230ºF to 240ºF. I'm in Connecticut and take advantage of FCP's lifetime replacement. Out of the options they stock, what would...