Thread: 125i to 135i?
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      03-12-2026, 08:54 PM   #6
wheela
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Drives: 2015 BMW X1 35i M-sport
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Quote:
Originally Posted by jamiewalkaa View Post
One thing I’m worried about is the oil starvation issues as I like to drive cars through the back roads and hard and slide them around
I'm probably biased, as I've had my n55 since 2017, but I think as long as you stay on top of oil leaks (keep your oil level full), and aren't tracking on r-compound tires (or doing a bunch of donuts), you'll probably be fine. That said, I believe some of the n55 folks here track their cars, maybe some of them can chime in?

If you're still uncomfortable, you can now do the s55 oil pump swap and have bullet-proof oiling, as long as it's a RWD car (s55 oil pump unfortunately doesn't work with the x-drive oil pan). There's even a guy on here now selling the custom brackets needed for the conversion.

For what its worth, I asked Google AI for its thoughts on the matter. Here's what it said:
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