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05-04-2010, 02:14 PM | #1 |
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OEM Brake fluid?
I have my M3 in for routine service on brake fluid, and before the tech flushed the system, they said they noticed my car has DOT 5 brake fluid in the system (this is what it came with from the factory), and that they only have DOT 4 fluid at the dealership to refill it with.
Which fluid is OEM spec, can I fill with DOT 4 or will i notice a performance degrade? I dont track the car... thanks! |
05-04-2010, 02:26 PM | #2 |
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Hey Kev - DOT 4 is fine. I am going to assume they mean DOT 5.1 not DOT 5. Just make sure they do a proper flush (I would assume they would but....)
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05-04-2010, 02:28 PM | #3 |
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05-04-2010, 02:37 PM | #4 |
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05-04-2010, 03:23 PM | #5 |
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SA called me back and they said they had made a mistake and that it was indeed DOT 4 in my car OEM.
The manufacturer had just changed colours of the fluid from green to clear, they thought the green was DOT5.1, which it wasn't! |
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05-04-2010, 04:24 PM | #6 |
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Brake fluid is clearly labeled 'DOT 4' on the cap, so use that. I used Castrol GT-LMA synthetic fluid, which meets DOT 4 specs. It's only $10 for a 32-oz bottle, which is enough even for the clutch. Make sure to reset your computer when you're done; it'll schedule another bleed 2 years from date of reset.
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05-04-2010, 05:43 PM | #7 |
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The stock fluid is from ATE, though it maybe a slightly different formula (inferior) from the Blue/Gold you can buy.
SRF is the best, but a little pricey. It'll make up for it with few fluid changes needed.
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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05-04-2010, 07:03 PM | #8 |
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