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16 Audi S3 G13 Coolant - 40,500 miles #5326698 01/19/20 12:43 AM
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agpatel Offline OP
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Below is Polaris Coolant Analysis on my 2016 Audi S3 with 40,500 miles. Coolant has not been changed and serviced by the dealer regularly. I think a service or so ago they topped off the coolant with concentrate thus the higher than 50/50 concentration. I sucked out all the coolant in the expansion tank and filled with new 50/50 and will do this every 500-1000 miles and see how it is after few thousand miles.

I cant find a good G13 virgin analysis and thus do not know how the other perimeters look like. Not too worried and will dump the fluid at 75k unless someone thinks it should be done now.


[Linked Image from photos.smugmug.com]

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5326804 01/19/20 07:32 AM
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Railrust Offline
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I think you're fine and this (as you know) is a long life coolant...I believe Audi says it's good for the life of the vehicle...I wouldn't go THAT far, but a 75,000 mile change should be more than good enough for this coolant.


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Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5326842 01/19/20 08:31 AM
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FordCapriDriver Offline
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Interesting that there are Phosphates present, G13 isn't supposed to have any, just Silicate + OAT
The new G12 Evo ( TL-774-L ) that was introduced in 2019 does however add Phosphates to the Silicate and OAT.


1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
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Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5326930 01/19/20 10:09 AM
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I don't fall for the "lifetime" nonsense. The heater core on our 2014 Jetta plugged up with only 54,000 miles. This is common on VAG products. Likely will change every 30K moving forward.


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Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: FordCapriDriver] #5327034 01/19/20 12:05 PM
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agpatel Offline OP
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Originally Posted by FordCapriDriver
Interesting that there are Phosphates present, G13 isn't supposed to have any, just Silicate + OAT
The new G12 Evo ( TL-774-L ) that was introduced in 2019 does however add Phosphates to the Silicate and OAT.


I am wondering if the dealer topped it off with G12+ but I would assume that they would not have any left as G12++ is the last verson before G13 and its the same essentially. Did not see any build up on the sensor in the tank and the silicate packet is still in tact - primary reason for me draining the tank was to check on the packet in the expansion tank.

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5340712 02/04/20 10:02 AM
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BMWTurboDzl Offline
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Originally Posted by agpatel
Originally Posted by FordCapriDriver
Interesting that there are Phosphates present, G13 isn't supposed to have any, just Silicate + OAT
The new G12 Evo ( TL-774-L ) that was introduced in 2019 does however add Phosphates to the Silicate and OAT.


I am wondering if the dealer topped it off with G12+ but I would assume that they would not have any left as G12++ is the last verson before G13 and its the same essentially. Did not see any build up on the sensor in the tank and the silicate packet is still in tact - primary reason for me draining the tank was to check on the packet in the expansion tank.



What is a "silicate packet"?


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Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: BMWTurboDzl] #5355883 02/20/20 06:33 PM
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agpatel Offline OP
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VW/Audi in the newer cars have a packet
Of silica in the expansion tank to supplement the coolant as the silica is used up. The silica is to protect against aluminum corrosion.

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