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2020 Audi Q7 55 TFSI — oil level dropping between changes — how much is too much?

NewCarOwnerCommunity StarterOct 12, 20252020 Audi Q7 55 TFSICharlotte
2020 Audi Q7 55 TFSI, about 78,000 miles. I've started checking the dipstick every 500 miles and the level is definitely moving down between oil changes. No obvious puddles and I don't see smoke. At what point would you stop calling this normal consumption and start testing? I'm in Charlotte. Trying to diagnose before I book a shop.
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29 replies

NorthMechanicish33Community StarterCommunity StarterOct 12, 2025permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2020 Audi Q7 and see if the fault moves. Don't erase codes until someone who can help has seen them. This is from a 2020 Audi Q7 in Charlotte with 78,000 miles. Parts cannon is a personality type I try to avoid. Happens in gear, not in park, for what that's worth.
NorthMechanicish33Community StarterCommunity StarterOct 12, 2025permalink
I'd want a measurement, not a hunch. A pressure test beats staring at a dry driveway if the 2020 Audi Q7 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. Parts cannon is a personality type I try to avoid. Happens in gear, not in park, for what that's worth.
BoxerRoadie58Community StarterCommunity StarterOct 13, 2025permalink
Intermittent stuff lies if you only catch it once. A pressure test beats staring at a dry driveway if the 2020 Audi Q7 is losing coolant with no puddle. If the cheap test changes it, stop and reassess. On “oil level dropping between changes — how,” that was the fork that mattered for me. This is from a 2020 Audi Q7 in Charlotte with 78,000 miles. Stop there until you know. If it repeats twice more I'll book time.
MileageHunterCommunity StarterCommunity StarterOct 13, 2025permalink
If it were in my driveway, two 2020 Audi Q7s can feel identical and have different causes, so measure before you copy someone else's repair. If the cheap test changes it, stop and reassess. This is from a 2020 Audi Q7 in Charlotte with 78,000 miles. If they can't show the line item, I assume it's hiding. Doing the boring step first on purpose.
BoxerRoadie58Community StarterCommunity StarterOct 13, 2025permalink
This is usually cheaper to test than to guess. A pressure test beats staring at a dry driveway if the 2020 Audi Q7 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. That's the whole play. Next check is the cheap one I can do in a driveway.
BoxerRoadie58Community StarterCommunity StarterOct 13, 2025permalink
I wouldn't throw parts yet. Loaded-suspension checks on the 2020 Audi Q7 catch play that a wheels-hanging inspection misses. You'll know quickly if you're on the wrong tree. Stop there until you know. Worth doing even if the car feels fine right now. I already checked the easy fluid levels.
NorthMechanicish33Community StarterCommunity StarterOct 13, 2025permalink
Ask what changed right before it started. Swap the cheap/easy piece first on the 2020 Audi Q7 and see if the fault moves. Don't erase codes until someone who can help has seen them. The universe charges extra for guessing. A day of patience here is cheaper than a wrong part. If this is nothing, great. I want that in data.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
Checked the easy stuff on the 2020 Audi Q7 and found one clue worth chasing before I book a shop. I already checked the easy fluid levels.
MileageHunterCommunity StarterCommunity StarterOct 13, 2025permalink
Fair point. Counterpoint: A pressure test beats staring at a dry driveway if the 2020 Audi Q7 is losing coolant with no puddle. Save the big job until that test fails. I'd want that in writing, not as a promise. If the story changes I'll post the new data.
NorthMechanicish33Community StarterCommunity StarterOct 13, 2025permalink
I'd want a measurement, not a hunch. Move a coil or plug on the 2020 Audi Q7 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. Parts cannon is a personality type I try to avoid. I keep a notes app thread for this now.
BoxerRoadie58Community StarterCommunity StarterOct 13, 2025permalink
Intermittent stuff lies if you only catch it once. Capture voltage while the 2020 Audi Q7 is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. On “oil level dropping between changes — how,” that was the fork that mattered for me. That's the whole play. This is the filter I use when the thread starts repeating itself. I already checked the easy fluid levels.
MileageNomad25Community StarterCommunity StarterOct 13, 2025permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2020 Audi Q7 and see if the fault moves. Don't erase codes until someone who can help has seen them. Any freeze-frame data saved? Worth doing even if the car feels fine right now. I'm in no rush to be a hero on it.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
I went back under the 2020 Audi Q7 and it only happens after a heat soak, not on a cold start. This is the version I'd tell a friend.
TrailNomadCommunity StarterCommunity StarterOct 13, 2025permalink
This is usually cheaper to test than to guess. Get a real battery/charging test on the 2020 Audi Q7, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. Do that first. Not driving it hard until I know more.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
Cleared nothing. I want service to see the alert on the 2020 Audi Q7 first. I refuse to clear codes until someone else sees them.
NorthMechanicish33Community StarterCommunity StarterOct 13, 2025permalink
I wouldn't throw parts yet. Loaded-suspension checks on the 2020 Audi Q7 catch play that a wheels-hanging inspection misses. Don't erase codes until someone who can help has seen them. The universe charges extra for guessing. Worth doing even if the car feels fine right now. Checking again after work.
RoadTravelerCommunity StarterCommunity StarterOct 13, 2025permalink
If it were in my driveway, capture voltage while the 2020 Audi Q7 is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. I'd want that in writing, not as a promise. Not driving it hard until I know more.
TrailGeekCommunity StarterCommunity StarterOct 13, 2025permalink
Log the conditions before you spend. Move a coil or plug on the 2020 Audi Q7 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. On “oil level dropping between changes — how,” that was the fork that mattered for me. Did the worksheet show tax yet? Checking again after work.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
It did oil level dropping between changes — how twice this week, both times after sitting. No change in mileage feel. Heat soak after errands is the other window.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
It did oil level dropping between changes — how twice this week, both times after sitting. No change in mileage feel. Trying not to diagnose from the couch.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
It did oil level dropping between changes — how twice this week, both times after sitting. No change in mileage feel. If that fails I'll eat the diagnostic fee.
RoadTravelerCommunity StarterCommunity StarterOct 13, 2025permalink
Ask what changed right before it started. Loaded-suspension checks on the 2020 Audi Q7 catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. This is from a 2020 Audi Q7 in Charlotte with 78,000 miles. I'd want that in writing, not as a promise. I keep a notes app thread for this now.
NewCarOwnerCommunity StarterCommunity StarterOct 13, 2025permalink
OP update: scanned the 2020 Audi Q7 again and still only have the one pending code, no new lights. If it repeats twice more I'll book time.
MileageNomad25Community StarterCommunity StarterOct 14, 2025permalink
This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2020 Audi Q7, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Have you gotten a second quote in writing? I'd rather pay for diagnosis than a second guess-repair.
NorthMechanicish33Community StarterCommunity StarterOct 14, 2025permalink
Intermittent stuff lies if you only catch it once. Get a real battery/charging test on the 2020 Audi Q7, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. On “oil level dropping between changes — how,” that was the fork that mattered for me. Parts cannon is a personality type I try to avoid. This is the filter I use when the thread starts repeating itself. If that fails I'll eat the diagnostic fee.
TrailNomadCommunity StarterCommunity StarterOct 14, 2025permalink
Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2020 Audi Q7 is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. On “oil level dropping between changes — how,” that was the fork that mattered for me. This is from a 2020 Audi Q7 in Charlotte with 78,000 miles. Do that first. Climate here is different, so treat that as a local data point. That's my plan before I call anyone.
MileageHunterCommunity StarterCommunity StarterOct 14, 2025permalink
If it were in my driveway, swap the cheap/easy piece first on the 2020 Audi Q7 and see if the fault moves. If the cheap test changes it, stop and reassess. Verbal 'we'll take care of it' is not a plan. I'd rather be boring and correct. That's my plan before I call anyone.
NewCarOwnerCommunity StarterCommunity StarterOct 14, 2025permalink
Tried a second charger / second scan and the story on the 2020 Audi Q7 didn't change. Wrote this up on my lunch break.
NewCarOwnerCommunity StarterCommunity StarterOct 14, 2025permalink
Tried a second charger / second scan and the story on the 2020 Audi Q7 didn't change. If the story changes I'll post the new data.
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