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Old Nov 13, 2025 | 06:41 PM
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Default oil over filled

I recently had the oil change on my 2024 SR, non Z51. When I checked the oil, I noticed that the dip stick showed about 3-5mm of excess oil. So, should I be concerned? Should I have the excess oil removed? Or is no big deal? I hope it is nothing to worry about.
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Old Nov 13, 2025 | 07:13 PM
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So this is less than 1/4 in (about 0.2 in) above the full mark. It probably ok. The tank is vented at the top and the vent line runs back to the left and right rocker arm covers. If the level was too high it would overflow into those lines, which are intended to carry just vapors as part of the PCV system. But if it really on 0.2 inch or less its probably not high enough to be a problem.

I have a little cheapo siphon pump, so I would probably remove it if that happened to me. Something like this below. But I'm not saying its necessary.


Last edited by Andybump; Nov 14, 2025 at 09:23 AM.
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Old Nov 13, 2025 | 07:17 PM
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Adding to my post 2, here is an image of the inside of the oil tank showing where I estimate that the full level is. You can see there is quite a lot of headroom above that and the vent is near the top. That's why I think 0.2 in above full is not likely to be an issue. The siphon kits come with a small tube that will fit through most dipstick tubes, but again, I'm not saying its necessary.


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Old Nov 13, 2025 | 07:29 PM
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Thanks. That is what I thought also. I assume that if I siphon the excess oil, the engine would need to be running.
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Old Nov 13, 2025 | 07:55 PM
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Originally Posted by Drewbzmn
Thanks. That is what I thought also. I assume that if I siphon the excess oil, the engine would need to be running.
It needs to be running to check the level. But not to siphon some oil out. The tank leaks down very slowly. I would do it with the engine off. Then run engine to verify level.
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Old Nov 13, 2025 | 09:32 PM
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...and go elsewhere for your next oil change.
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Old Nov 14, 2025 | 08:39 AM
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Originally Posted by Avanti
...and go elsewhere for your next oil change.
agreed! ‘
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Old Nov 14, 2025 | 08:40 AM
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Originally Posted by Andybump
It needs to be running to check the level. But not to siphon some oil out. The tank leaks down very slowly. I would do it with the engine off. Then run engine to verify level.
Thanks. That’s what I will do.
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Old Nov 14, 2025 | 09:28 AM
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Originally Posted by Drewbzmn
I recently had the oil change on my 2024 SR, non Z51. When I checked the oil, I noticed that the dip stick showed about 3-5mm of excess oil. So, should I be concerned? Should I have the excess oil removed? Or is no big deal? I hope it is nothing to worry about.
I'm not really sure that this "overfill" is such an egregious error that I would switch dealers, unless I had other issues. You said it was 3-5 mm, which is less than 0.2 in. That's pretty small, and I think harmless. I took several readings of mine this morning and mine varies between readings by that much, and one of them was just above the full mark - most were not. I might ask the dealer about it. If am reading you post right, here is what it looks like on the dipstick:








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Old Nov 14, 2025 | 09:56 AM
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Originally Posted by Andybump
I'm not really sure that this "overfill" is such an egregious error that I would switch dealers, unless I had other issues. You said it was 3-5 mm, which is less than 0.2 in. That's pretty small, and I think harmless. I took several readings of mine this morning and mine varies between readings by that much, and one of them was just above the full mark - most were not. I might ask the dealer about it. If am reading you post right, here is what it looks like on the dipstick:


The oil level on my dip stick is approximately between the L & E in the word idle on your dip stick.
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Old Nov 14, 2025 | 10:05 AM
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I wouldn't mess with it. That's over by a de minimus amount.

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Old Nov 14, 2025 | 12:45 PM
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Default 3.2 oz or less!

Originally Posted by Drewbzmn
The oil level on my dip stick is approximately between the L & E in the word idle on your dip stick.
Yep. So that means it a touch less than 0.2 in above that mark. So........on the dipstick the markings for the normal range are exactly 2" apart. If that represents 1 quart from min to max, then 0.2 inches is a whopping 1/10 th of a quart or about 3.2 oz of oil. Here's what that looks like. If you do choose to remove some, I would be interested in how much it took to get it back to the full mark.



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Old Nov 14, 2025 | 01:29 PM
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If I remove some oil, I’ll post how much.
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Old Nov 17, 2025 | 06:20 PM
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Is it possible to remove oil by inserting an oil extractor down the oil full tube instead of the dip stick tube?
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Old Nov 17, 2025 | 06:48 PM
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Originally Posted by Drewbzmn
Is it possible to remove oil by inserting an oil extractor down the oil full tube instead of the dip stick tube?
If you look at the illustration in post 3, it appears that there is a baffle in filler pipe. I'm thinking its not going to be good to try and fish a tube thought there. Most of the cheapo pumps, like the one I posted in post 2, come with small tube that will go right down the dipstick tube.


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Old Nov 17, 2025 | 07:04 PM
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Originally Posted by Andybump
If you look at the illustration in post 3, it appears that there is a baffle in filler pipe. I'm thinking its not going to be good to try and fish a tube thought there. Most of the cheapo pumps, like the one I posted in post 2, come with small tube that will go right down the dipstick tube.
Thats what I thought when I looked at the image in post 3. Hence my question. Unfortunately, fluid transfer pumps/syringes are unavailable locally. I’ll have to order one. Thanks for your reply.
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Old Nov 17, 2025 | 07:05 PM
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Here is what I think is a baffle in the filler tube. And also you can see the filler tube has very sharp bends in it. I don't think an extractor tube can be fished through there.

While I was looking for the illustrations, I took a look at the "Oil Tank Replacement Procedure". And, it is non-trivial, requiring removal of the engine. So, don't do anything that might make it necessary to replace the tank, such as loosing the tube in the dipstick tube. I think if you have a long enough, and small enough diameter tube, you can safely insert it through the dipstick (with no force), and with no danger of loosing the tube.




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Old Nov 17, 2025 | 07:18 PM
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Good advice, as losing the tube in the tank is my concern also. Since there are no symptoms of too much oil & the car will probably be parked soon for the winter, I’ll probably wait until spring & change the oil then. That will solve the problem of too much oil. Thanks again for your advice.
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Old Nov 17, 2025 | 07:21 PM
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Leave it be. There's no harm to be had with that amount of oil. Drive and enjoy.
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Old Nov 17, 2025 | 07:24 PM
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Originally Posted by Mark9
Leave it be. There's no harm to be had with that amount of oil. Drive and enjoy.
That’s exactly what I’m going to do.
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