Extensive Photos 24 GT Coolant Level Fluctuating?

[TheGrabberBlueGT2024]

The car has almost 13k miles as it sits bought it brand new December 2024. It is parked in the same spot religiously. I have an extensive record of my coolant level in the overflow tank from when I filled it to max in July when cold and have watched it slowly drop and even go back up a little over several months. Like everyone else I had a low level from factory so I filled it to max when cold it was slightly below the min line. It appears to have stabilized but I can’t tell. I don’t even see why it would drop in the first place after I filled it. Oil analysis doesn’t show any coolant in oil. I have been reading different threads on 7g and have talked to another owner in private messages about it. Don’t really know what to think of it or if I should even do anything about it like top it off again? This spans from July 2025 to December 2025. Knowledge is helpful and that’s why I’m sharing. It ends at 12/13/25 I'm not sure why it double posted the photos. Anyone who has experienced this or has extra insight would love to see your thoughts thanks.
Coolant Check and Fill 7/3/25

Coolant Check 7/4/25

Coolant Check 7/8/25

Coolant Check 8/11/25

Coolant Check 8/28/25

Coolant Check 9/8/25

Coolant Check 9/15/25

Coolant Check 9/28/25

Coolant Check 10/31/25

Coolant Check 11/1/25

Coolant Check 11/4/25

Coolant Check 11/16/25

Coolant Check 12/11/25

Coolant Check 12/13/25

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[D/\rK•650]

I would venture to say every car does this. Coolent level fluctuations are normal part of liquid cooled motors. From thermal expansion and contraction, as long as the level falls within the indicator marks should be just fine.

 

[TheGrabberBlueGT2024]

That’s fair but why is the level just disappearing?

 

[Junkyard Dog]

Looks like pee.

 

[D/\rK•650]

That’s fair but why is the level just disappearing?

You mean when it looks clear?

 

[TheGrabberBlueGT2024]

You mean when it looks clear?

No over the 5 month period the level has visibly dropped from when I started trending it.

 

[D/\rK•650]

It should stabilize. Maybe it will now stay around the level it currently is, wait another 5 months see if it changes again.

 

[D/\rK•650]

I think that it's a normal thing to have it fluctuate like that. It is just the overflow tank. It will change. Maybe someone alot smarter can chime in.

 

[TheGrabberBlueGT2024]

It should stabilize. Maybe it will now stay around the level it currently is, wait another 5 months see if it changes again.

I will continue to monitor just thought there might be something to explain the disappearance other than evaporation. I noted that the manual says something like if you have to add more than 1 liter a month take it to the dealer?

 

[TheGrabberBlueGT2024]

Looks like pee.

I think over time discoloration is normal but I do shine the flashlight in some photos that may also affect things.

 

[D/\rK•650]

Continue to monitor it. If it seems to be excessive take to dealership.

 

[TheGrabberBlueGT2024]

Continue to monitor it. If it seems to be excessive take to dealership.

Yeah I plan to that’s just it I don’t know what’s normal and what isn’t. I hope others begin to chime in. Thank you.

 

[Junkyard Dog]

I think it is normal for the coolant level to be lower in December than in July in Texas.

 

[TheGrabberBlueGT2024]

I think it is normal for the coolant level to be lower in December than in July in Texas.

That’s true but the drop happened in the earlier months as well. End of August early September it’s visibly not where it started. It’s definitely interesting.

 

[MAT1955]

If it isn't in your oil and is not visible coming out your tail pipes (easy to see) and there are neither leaks from the block (easy to see and smell - sweet smell) nor from your inside cabin heater (easy to smell - sweet smell) then the rise and falls are normal for where you live and drive. BTW at every oil change I do (yes, I'm ocd and do them more often) my dealership tops-up all engine compartment fluids as part of the oil change package so I'd have no indication that there low level indicators - except that when I put that question to them they said " MT if we saw a level that indicated a problem you'd be the first to know. "

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