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Drbrown · 06-05-2015, 12:03 AM

Car manufactures have been using DOT 5 for many years but I note that they prescribe that owners flush the brake systems variously at about every 50,000 miles .... not a cheap procedure. Our three family cars have hydraulic brake switches and clutches and never had a problem. It appears that the hydraulic brake switch problems are related to aftermarket units.

I use DOT 4 in my vintage but flush every 5 or so years.

06-05-2015, 12:03 AM	#24
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,267	Re: dot 3 or dot 5 good and the bad Car manufactures have been using DOT 5 for many years but I note that they prescribe that owners flush the brake systems variously at about every 50,000 miles .... not a cheap procedure. Our three family cars have hydraulic brake switches and clutches and never had a problem. It appears that the hydraulic brake switch problems are related to aftermarket units. I use DOT 4 in my vintage but flush every 5 or so years.