10-14-2022, 05:28 PM | #1 |
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Hello, My Castrol srf is going 1 year this nov and the car is my NOT daily, just occasionally canyons run. Did like 2 track days and I have one track day left this year. I'm curious if I should change it now it will be just fine 1 more track. My very first day track I did a lot of braking and second not that much. Anyone here have the same fluid that occasionally track their car?
Also, How do you know if you're brake fluid is going bad? Thanks OG M2 |
10-16-2022, 09:19 AM | #2 | |
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10-16-2022, 10:56 AM | #3 | ||
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10-16-2022, 02:52 PM | #4 | |
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I get my SRF flushed every 12 months or less.
A good question is how fast of a track will you be on. COTA is the fastest track I run where for me turn 1 is 135 to 40 and the back straight at 150 to 40 and I need the brakes to work. On slower tracks I wouldn’t be as worried. Quote:
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10-16-2022, 05:35 PM | #5 | ||
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10-16-2022, 06:28 PM | #6 |
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I talked to a few people from the last bmw cca event. They generally wanna see it changed every 6 months or 3 track weekends or else they won't pass pre track day track inspection for bmw cca.
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10-16-2022, 07:34 PM | #7 |
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10-16-2022, 08:06 PM | #8 | |
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10-19-2022, 11:49 AM | #9 | ||
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10-19-2022, 04:37 PM | #10 | |
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The beauty of SRF is that WET boiling point is very close to DRY boiling point. I've use the same flush of SRF for 3 years in my M2, with multiple 'Ring and Spa track days. Now in Camaro SS 1LE which reaches higher top speeds than my M2 did, and I just wrapped up year 2 and 8 track days on this fluid. I will change it before start of next season, but I just did Mid Ohio, which is a fast track with a few BIG brake zones, on hardly any thickness of the brake pads. No issues with fluid at all. SRF is solid for 2-3 year interval. Doing it annually with SRF is like changing you BWM LL oil every 3000 miles.
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10-19-2022, 04:57 PM | #11 | ||
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10-19-2022, 05:51 PM | #12 | |
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Even when saturated with moisture it’s wet boiling point is way better than the competition. I did sub 8min Nordschleife laps on it during year 3. Plus in every hard braking situation I put it in, it delivered. So why would I change it earlier? |
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10-19-2022, 06:33 PM | #13 |
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“an abundance of caution”
idiom: mainly US The fact that someone is being extremely careful to avoid a particular risk, even if the risk is small: E.g - “The airline said that out of an abundance of caution they would temporarily ground their entire fleet of planes.” SRF may have worked in your extended use case scenario without repercussions but given the risk some choose to change SRF on shorter intervals. To each their own. Ain’t gotta smoke my brand cigarettes to be cool. Running sub 8 ring laps is cool. |
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10-19-2022, 06:53 PM | #15 | |
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10-19-2022, 08:38 PM | #17 |
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