EngineQuestionCommunity Starter

2020 BMW M2 — oil level drops between services with no puddle

EVHauler534Community StarterMar 21, 20262020 BMW M2 CompetitionQueens
I started measuring the oil level every few hundred miles and it is definitely falling between changes. There is no obvious puddle and I do not notice smoke. How would you document and diagnose this instead of guessing?
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18 replies

HighwayNerdCommunity StarterCommunity StarterMar 21, 2026permalink
If it were mine, measure it if you can. Two cars can feel identical and have different causes.
EVHauler534Community StarterCommunity StarterMar 21, 2026permalink
OP here — I recorded a short video and noted speed, temp, and whether it was in gear.
EVCommuterCommunity StarterCommunity StarterMar 21, 2026permalink
One thing that mattered for me: capture when the 2020 BMW M2 does it — temp, speed, and whether it is in gear — before replacing parts.
MarketMiles399Community StarterCommunity StarterMar 22, 2026permalink
I would start here: measure it if you can. Two cars can feel identical and have different causes.
EVHauler534Community StarterCommunity StarterMar 22, 2026permalink
I went back under the 2020 BMW M2 tonight and wrote down when it happens: only after a heat soak, not on a cold start.
OldSchoolGalCommunity StarterCommunity StarterMar 22, 2026permalink
On that point — measure it if you can. Two cars can feel identical and have different causes.
TowScout224Community StarterCommunity StarterMar 22, 2026permalink
Before you spend money, if it is cylinder-specific on the 2020 BMW M2, move a coil or plug and see whether the code follows.
EVHauler534Community StarterCommunity StarterMar 22, 2026permalink
OP update: I scanned it again on the 2020 BMW M2 and still only have the one pending code, no new lights. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt.
ShiftGuy438Community StarterCommunity StarterMar 24, 2026permalink
On that point — swap the cheap/easy piece first on the 2020 BMW M2 and see if the fault follows.
BoostGal550Community StarterCommunity StarterMar 22, 2026permalink
If it were mine, measure it if you can. Two cars can feel identical and have different causes. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt.
CamberGarage964Community StarterCommunity StarterMar 22, 2026permalink
I would start here: I would want a real battery/charging test, not just resting voltage, before blaming a module.
DailyCommuter815Community StarterCommunity StarterMar 22, 2026permalink
One thing that mattered for me: capture when the 2020 BMW M2 does it — temp, speed, and whether it is in gear — before replacing parts. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt.
HybridDetailer360Community StarterCommunity StarterMar 22, 2026permalink
One thing that mattered for me: if it is cylinder-specific on the 2020 BMW M2, move a coil or plug and see whether the code follows.
EVHauler534Community StarterCommunity StarterMar 22, 2026permalink
OP update: I scanned it again on the 2020 BMW M2 and still only have the one pending code, no new lights.
HybridDetailer360Community StarterCommunity StarterMar 22, 2026permalink
I would start here: measure it if you can. Two cars can feel identical and have different causes. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt.
PistonDaily680Community StarterCommunity StarterMar 22, 2026permalink
If it were mine, I would want a real battery/charging test, not just resting voltage, before blaming a module.
TowScout224Community StarterCommunity StarterMar 22, 2026permalink
Before you spend money, if it is cylinder-specific on the 2020 BMW M2, move a coil or plug and see whether the code follows. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt.
TowScout224Community StarterCommunity StarterMar 23, 2026permalink
One thing that mattered for me: capture when the 2020 BMW M2 does it — temp, speed, and whether it is in gear — before replacing parts. That is from a 2020 BMW M2 in Queens, so take the climate with a grain of salt. Happy to compare notes if your setup differs.
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