Going to performance driving school. 2010 Z oil temp question

Originally Posted by SeattleLion

I didn't mention one big thing that may affect my ability to drive on a track: my Z has AT. I have heard the AT is fast as hell. The paddle shifters seem a bit slow to respond, but they do allow bigtime downshifts. I use it regularly on mountain downgrades and it is a real brake saver.

I also replaced my brake lines with teflon/ss and used DOT 5.1 AP fluid, so from a braking perspective I think I am ok. I ordered my helmet last nght (AS 2005 open face). It's going to tough waiting till March.

Originally Posted by djpathfinder

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.