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signsup · 03-11-2025, 10:24 AM

No ersonal experience, but I have replaced entire brake systems on vintage military vehicles and have asked the owners if they wanted to go DOT 5 as this would be the time to do it. Not one has gone that route. DOT 3 or 4. Their decision after research, not mine. You will read that 5 is not compatable with 3 or 4 and I would certainly bleed down the system and perhaps run some mineral spriits through the system and then bleed dry. But someone told me that if you read the labels on DOT 5 you will not see any warnings about mixing with other bluids. Interesting.

03-11-2025, 10:24 AM	#10
signsup Senior Member Join Date: Mar 2017 Posts: 200	Re: Switch to silicon brake fluid? No ersonal experience, but I have replaced entire brake systems on vintage military vehicles and have asked the owners if they wanted to go DOT 5 as this would be the time to do it. Not one has gone that route. DOT 3 or 4. Their decision after research, not mine. You will read that 5 is not compatable with 3 or 4 and I would certainly bleed down the system and perhaps run some mineral spriits through the system and then bleed dry. But someone told me that if you read the labels on DOT 5 you will not see any warnings about mixing with other bluids. Interesting.