Nissan 370Z Forum - View Single Post

djpathfinder · 09-20-2010, 10:53 PM

If you read the label on most DOT4 fluids, it will tell you that you can mix DOT4 with DOT3. You might as well do it right the first time and flush your system with DOT4 brake fluid. If you're careful, you should be able to drain, flush and bleed with new DOT4 and use 2 quarts. Don't use DOT5...that is silicone based and is not compatible with ABS brakes. DOT4 is fine with ABS. DOT4 has a higher boiling point than DOT3, and therefore is more performance oriented. Likely overkill for most, especially if your car remains on the street 100% of the time, but if you want to splurge a little it doesn't hurt. Keep in mind, some luxury brands put DOT4 in their vehicles from the factory, eg. BMW, Mercedes-Benz.

In my opinion, if you can afford a good quality DOT4 go for it. If not, a "house brand" DOT4 is likely better than a DOT3 fluid.

09-20-2010, 10:53 PM	#18 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	If you read the label on most DOT4 fluids, it will tell you that you can mix DOT4 with DOT3. You might as well do it right the first time and flush your system with DOT4 brake fluid. If you're careful, you should be able to drain, flush and bleed with new DOT4 and use 2 quarts. Don't use DOT5...that is silicone based and is not compatible with ABS brakes. DOT4 is fine with ABS. DOT4 has a higher boiling point than DOT3, and therefore is more performance oriented. Likely overkill for most, especially if your car remains on the street 100% of the time, but if you want to splurge a little it doesn't hurt. Keep in mind, some luxury brands put DOT4 in their vehicles from the factory, eg. BMW, Mercedes-Benz. In my opinion, if you can afford a good quality DOT4 go for it. If not, a "house brand" DOT4 is likely better than a DOT3 fluid. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD Last edited by djpathfinder; 09-20-2010 at 11:01 PM.