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Old 05-25-2021, 03:11 PM   #1
Crushed 1LE
 
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Drives: 2022 ZL1(FEA suspension) Rapid Blue
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DOT 4 Brake fluid

Any of you track rats switched to DOT4 fluid? Is it necessary in your opinion? Do you have problems prior and/or did you notice an increase in longevity in longer sessions?
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Old 05-25-2021, 03:49 PM   #2
Checkmate1
 
Drives: Garnet Red / ZL1 1LE
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Yes, switched to Castrol SRF.

Necessary in heavy cars like ours.
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Old 05-25-2021, 03:49 PM   #3
cdb95z28


 
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If you are tracking, it is critical that you switch. Expensive brake fluid will be the cheapest insurance you'll ever buy.
especially if you have a ZL1 1LE.
Castrol SRF, Brembo HTC64T or Endless RF-650.

Read the track day prep in the owner's manual.
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Old 05-25-2021, 04:00 PM   #4
Alpha1BC

 
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Ditto. 100% required for track driving. Castrol SRF and Brembo HTC64T are two options I've used previously and both do well.
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Old 05-25-2021, 04:03 PM   #5
RamAir02
Shadow Gray '19 ZLE M6
 
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Castrol SRF or Motul 660 for me
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2019 ZL1 1LE | M6 | SGM | PDR | CF Dash | Nav | Wheel Locks
PPF | Paint Correction | ZL1 Addons Rock Guards | ZL1 Addons Lift Pads | ZL1 Addons Feather Lite Tow Hook | JWM Smoked Sidemarkers | Wildhammer Smoked Rear Reflectors | JWM License Plate LEDs | RotoFab CAI | ADM IC Reservoir v2 | BC Forged RZ05 | SPL Toe Arms | BW Brake Deflectors | CMS Roll Bar | Schroth Profi II ASM Harnesses
.
Sold: '99 Trans Am (bolt-ons & cam) | '00 WS6 (bolt-ons, heads, cam, 12 bolt) | '05 CTS-V (bolt-ons, short throw) | '10 SS/RS M6 (short throw, CAI, coilovers, LTs, catback, JRE tune) | '01 WS6

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Old 05-25-2021, 04:10 PM   #6
kropscamaro16


 
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motul 660 here
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Old 05-25-2021, 04:17 PM   #7
Crushed 1LE
 
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Awesome. Thanks guys. Approx quantity needed for a full flush?
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Old 05-25-2021, 04:21 PM   #8
RamAir02
Shadow Gray '19 ZLE M6
 
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Quote:
Originally Posted by Crushed 1LE View Post
Awesome. Thanks guys. Approx quantity needed for a full flush?
1.5L but get 2L to be on the safe side.
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2019 ZL1 1LE | M6 | SGM | PDR | CF Dash | Nav | Wheel Locks
PPF | Paint Correction | ZL1 Addons Rock Guards | ZL1 Addons Lift Pads | ZL1 Addons Feather Lite Tow Hook | JWM Smoked Sidemarkers | Wildhammer Smoked Rear Reflectors | JWM License Plate LEDs | RotoFab CAI | ADM IC Reservoir v2 | BC Forged RZ05 | SPL Toe Arms | BW Brake Deflectors | CMS Roll Bar | Schroth Profi II ASM Harnesses
.
Sold: '99 Trans Am (bolt-ons & cam) | '00 WS6 (bolt-ons, heads, cam, 12 bolt) | '05 CTS-V (bolt-ons, short throw) | '10 SS/RS M6 (short throw, CAI, coilovers, LTs, catback, JRE tune) | '01 WS6

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Old 05-25-2021, 04:26 PM   #9
PROMETHEUS

 
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BREMBO HTC64T OR CASTROL SRF!!!! My local dealership switches mine out for me and only needs 1 Liter to make that happen. Like someone has already said.....it is the cheapest track insurance you will ever buy.
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Old 05-25-2021, 04:31 PM   #10
Vtor_ZL1
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Motul BaRF (RBF?) 600 or 660
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ing for grip.


Are you in the NY/NJ/PA/CT region? Join us for autox fun at MetLife Stadium. HUGE lots, tons of runs.

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Old 05-26-2021, 09:34 AM   #11
Crushed 1LE
 
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2 litres of 660 on the way. Thanks all for the input!
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Old 05-26-2021, 11:41 AM   #12
SFV1LE

 
Drives: 2018 Hyper Blue ZL1 1LE
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Quote:
Originally Posted by Crushed 1LE View Post
2 litres of 660 on the way. Thanks all for the input!
Motul 660 did not work for me. I had excessive reservoir "sweating" which may have been actual boil-over.

More importantly, my pedal became very spongy at times.

Switching to Brembo HTC64 eliminated both spongy pedal and sweating, I know Motul makes high quality stuff but I would not use 660 again... Castrol or Brembo only IMO.
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Old 05-26-2021, 11:48 AM   #13
SFV1LE

 
Drives: 2018 Hyper Blue ZL1 1LE
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Quote:
Originally Posted by Crushed 1LE View Post
2 litres of 660 on the way. Thanks all for the input!
Motul 660 did not work for me. I had excessive reservoir "sweating" which may have been actual boil-over.

More importantly, my pedal became very spongy at times.

Switching to Brembo HTC64 eliminated both spongy pedal and sweating, I know Motul makes high quality stuff but I would not use 660 again... Castrol or Brembo only IMO.
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Old 05-26-2021, 04:28 PM   #14
20Bluezl1

 
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I use SRF as when I was asking around alot of guys had problems with Motul and almost no bad reviews for the SRF and Brembo.
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