Mt Tam I am's Driving Journal

Originally Posted by wstar Are you sure DOT5.1 fluid is a good idea? Most run a good DOT4 like Motul RBF600 or Castrol SRF. I know 5.1 is technically 4-compatible

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07-21-2013, 12:04 PM

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Mt Tam I am

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Quote:

Originally Posted by wstar

Are you sure DOT5.1 fluid is a good idea? Most run a good DOT4 like Motul RBF600 or Castrol SRF. I know 5.1 is technically 4-compatible (unlike 5.0), but I think it's also significantly different in viscosity and chemical composition from DOT4.

It is silicone based and not DOT 4 compatible. I am using DOT 5.1 as my brake fluid too. It all needed to be flushed first.

I would happily use DOT 4. Most importantly change the fluid, even with DOT 3.

I boiled my DOT 4 at Laguna Seca, so on to 5.1.

You will never boil DOT 4 at auto cross.

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