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Farmall_1937 · 03-12-2025, 03:22 PM

We considered DOT 5 for a '66 Mustang, but decided to stick with DOT 3. The manufacturer of the disk brake recommended we didn't use DOT 5, but didn't give much reasoning. Might not hurt to check with the wheel cylinder and master cylinder vendors before switching in the future. My grandfather's '39 Buick is running DOT 5 and has been working well. As others have said, bleeding it can be a pain.

03-12-2025, 03:22 PM	#16
Farmall_1937 Junior Member Join Date: Mar 2025 Location: Allegan, Michigan Posts: 9	Re: Switch to silicon brake fluid? We considered DOT 5 for a '66 Mustang, but decided to stick with DOT 3. The manufacturer of the disk brake recommended we didn't use DOT 5, but didn't give much reasoning. Might not hurt to check with the wheel cylinder and master cylinder vendors before switching in the future. My grandfather's '39 Buick is running DOT 5 and has been working well. As others have said, bleeding it can be a pain.