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16 Audi S3 G13 Coolant - 40,500 miles #5326698 01/19/20 01:43 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 08:32 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.


2018 Chevy Silverado 5.3 (sold, with 52,000 stumbling and bumbling miles)
2007 Lexus LS460 (deceased)
2008 Honda CRV
2016 Toyota Avalon XLE
(Whatever synthetic oil is on sale or rebate)
Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5326842 01/19/20 09:31 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 - 315k, Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - 110k, Valvoline Maxlife 10W-40

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5326930 01/19/20 11:09 AM
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gregk24 Offline
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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.


2012 Honda Accord EX-L K24z3
61,xxx miles
PPPP 0w20 / Fram Ultra

2014 VW Jetta SE 1.8T ea888
54,xxx miles
Castrol Edge 0w40 / OEM filter
Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: FordCapriDriver] #5327034 01/19/20 01:05 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 11:02 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"?


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: BMWTurboDzl] #5355883 02/20/20 07:33 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.

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5367114 03/04/20 12:56 PM
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BMWTurboDzl Offline
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Originally Posted by agpatel
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.

thumbsup learned something new.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5381312 03/20/20 02:26 PM
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FordCapriDriver Offline
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Originally Posted by agpatel
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.


Interesting, as VW coolant from 2012 onwards already has Silicate + OAT

The newest, called G12 Neo, is the same as G13 but has Phosphate aswell

Last edited by FordCapriDriver; 03/20/20 02:27 PM.

1975 Ford Capri II Ghia 3000 V6 - 315k, Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - 110k, Valvoline Maxlife 10W-40

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: gregk24] #5382418 03/21/20 08:50 PM
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Originally Posted by gregk24
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.


Never had a VW with the heater core plugged up at 54,000 miles... 2002 Golf TDI at 170,000 miles... no issues. Coolant was replaced at 100,000 miles with the timing belt change

2008 Passat, traded in at 217,000 miles. Coolant was replaced at 100,000 miles with timing belt change

2016 Tiguan, up to the new engine at 107,000 miles... no issues... new engine came with new coolant.


2016 VW Tiguan
Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: UG_Passat] #5457929 06/19/20 05:52 PM
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3turbodiesels Offline
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Heater Core failure common on 2012 to 2014 Passats.
I have a 2014 TDI Passat that had to have a new heater core at 27,000 miles.
Buddy has same car and had his replaced at about the same mileage.
I’ve been monitoring the PH of the coolant and mine at 32,000 miles was already at 6.5.
I changed about 3 liters of the coolant (G13) and the PH has come back up Pretty close to what the new coolant is.
VW has extended warranty on the Passat to 120,000 miles. I don’t think this heater core issue is just with the TDI cars.

Re: 16 Audi S3 G13 Coolant - 40,500 miles [Re: agpatel] #5458894 06/21/20 02:34 AM
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FordCapriDriver Offline
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It's probably why they have added now Phosphate to the formulation with the new G12 Evo, G13 had a fairly low Reserve Alkalinity of only about 5 and a starting pH of about 8 which ofcourse means more likelyhood of it going acidic.


1975 Ford Capri II Ghia 3000 V6 - 315k, Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - 110k, Valvoline Maxlife 10W-40

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