[chumlee]

I'm considering buying a 2017 540 with consistent oil changes, but one interval was overdue by 4k miles. This car is optioned with the B&W audio system; otherwise, I would look for another car. Below are the oil intervals. Would you buy it? How much damage or sludge would that mistake cause?

12/18/2017 (10,653) to 08/13/2018 (19,928):

Interval: 9,275 miles
08/13/2018 (19,928) to 04/29/2019 (29,445):

Interval: 9,517 miles
04/29/2019 (29,445) to 12/28/2019 (40,329):

Interval: 10,884 miles
12/28/2019 (40,329) to 10/12/2020 (48,549):

Interval: 8,220 miles
10/12/2020 (48,549) to 07/22/2021 (56,728):

Interval: 8,179 miles
07/22/2021 (56,728) to 05/03/2022 (64,771):

Interval: 8,043 miles
05/03/2022 (64,771) to 04/10/2023 (78,963):

Interval: 14,192 miles
04/10/2023 (78,963) to 11/09/2023 (88,026):

Interval: 9,063 miles
11/09/2023 (88,026) to 08/13/2024 (99,655):

Interval: 11,629 miles

[Efthreeoh]

So it did 14,000 miles in 6 months? Has to be mostly highway miles. Wouldn't even worry about it. My '06 N52 has a lifetime OCI average now of 12,150 miles. OCI average from oil change 1 to 13 was 16,000+. It's sitting now at 425,000 and still makes the same power levels as when new.

Do you know what oil and filters were used? Owner, Dealer, or BMW Indy did the changes? Looks like a dealership oil maintenance schedule, which means the proper oil and filter were used.

[ppointer]

When it comes to m52, the first BMW I owned, the default oil change reset was 15k miles (25,000 k's to be exact). I like to do my turbo motors no more than 10k miles. I think in this case I would not worry about the 14k interval. Everything else looks good.

[BlkGS]

I wouldn't buy it due to many miles regardless of the interval.

[Jolbex]

In Germany my b58 (x3) has 30kkm interval anyway....

[M5Rick]

9 oil changes so far is no problem, go ahead.

[Redd]

14k miles is no big deal. 20 years ago oil changes were 20k miles and the oil tech wasn't even as good as it is now.