[elprincep]

Which brake fluid do you recommend for daily driving and sporadic trackdays ?

[Saigonheat84]

Motul 600 for daily and occasional canyon run.

Motul 660 for track day.

Im currently using the Motul 600

[HP Autosport]

Castrol SRF. It is one of the best in the industry, with one of the highest wet boiling temperatures.

[X_Drive]

I used RBF660 in my F87 Comp. Never let me down. Using it in the G87 now as well. However, SRF (pricey) and Torque(when you can find it) are probably the best in the biz due to fantastic wet boiling points.
I'll probably switch to either one when my case is done.

[HP Autosport]

Originally Posted by X_Drive

I used RBF660 in my F87 Comp. Never let me down. Using it in the G87 now as well. However, SRF (pricey) and Torque(when you can find it) are probably the best in the biz due to fantastic wet boiling points.
I'll probably switch to either one when my case is done.

If you are too lazy to flush after each event, the SRF will still have a very high wet boiling temperature, whereas the others don't.

[LeggoRacing]

Endless has been my favorite in multiple cars. Good compressibility characteristics and helps pedal feel

[Speedy]

I’ve been using the RBF 600 for many years until I discovered the Ferodo Super Formula, which to me is much better at everything.

Both are DOT 4, so you avoid the problems of the DOT 5, but in my experience the Ferodo has better resistance to high temperatures and degrades better over time.

[chris719]

G87 and all new BMWs are designed for low viscosity brake fluid. The ABS pump won't work as fast with thicker DOT 4 fluids. You should use DOT 4 LV / DOT 5.1 or Bosch ESI6 for street use.

[Speedy]

Originally Posted by chris719

G87 and all new BMWs are designed for low viscosity brake fluid. The ABS pump won't work as fast with thicker DOT 4 fluids. You should use DOT 4 LV / DOT 5.1 or Bosch ESI6 for street use.

Well, thank you, that's good to know! My current car is an M2 F87, and in the summer, I will have my new G87. However, I am not aware of the recommended viscosity of brake fluid for the new GX models.

Your answer would have prevented me from using the Ferodo DOT 4 for the new M2!!

[aerobod]

Originally Posted by Speedy

Well, thank you, that's good to know! My current car is an M2 F87, and in the summer, I will have my new G87. However, I am not aware of the recommended viscosity of brake fluid for the new GX models.

Your answer would have prevented me from using the Ferodo DOT 4 for the new M2!!

In high ambient temperatures you may not notice the difference between a normal DOT4 and DOT4 LV fluid, but in lower temperatures we see here in Canada it certainly makes a difference in the winter with really slow and inconsistent operation of the ABS & DSC with non-LV fluid when it is very cold.

BMW have actually specified LV fluid for more than a decade now, as have Porsche. Best to swap between LV fluid for winter use and non-LV fluid only if needed for track use. With a manual car, non-LV fluid will also cause more intrusive CDV (Clutch Delay Valve) delays in the clutch pedal return, if the valve hasn't been removed.

[chris719]

Originally Posted by Speedy

Well, thank you, that's good to know! My current car is an M2 F87, and in the summer, I will have my new G87. However, I am not aware of the recommended viscosity of brake fluid for the new GX models.

Your answer would have prevented me from using the Ferodo DOT 4 for the new M2!!

It's actually a requirement as far back as E9x I believe. I'm not sure it's really a big problem or anything, but for street use I think Bosch ESI6 is probably the best stuff available.

[ggggbmw]

Originally Posted by aerobod

Best to swap between LV fluid for winter use and non-LV fluid only if needed for track use. With a manual car, non-LV fluid will also cause more intrusive CDV (Clutch Delay Valve) delays in the clutch pedal return, if the valve hasn't been removed.

This is what I do. Every spring I put in Castrol SRF for track days. And every fall I put in Pentosin LV or ATE SL.6 (also LV) for the winter.

If you aren't tracking, you are probably better off just changing the LV fluid every year. Unless you are really torching the brakes on a track, fresh fluid has nearly the same 'dry' temp limits as track fluids, and will work just as well. And if you flush every year, it will never get 'wet'.

[Speedy]

Originally Posted by chris719

It's actually a requirement as far back as E9x I believe. I'm not sure it's really a big problem or anything, but for street use I think Bosch ESI6 is probably the best stuff available.

Okay, I had no idea. Probably because where I live, the temperatures in winter almost never drop below 10ºC (50ºF) ... in very exceptional situations, we can get down to -1 or -2ºC (30ºF or 28ºF), but very punctual days and very occasionally.

The problem is usually more of summer temperatures, which reach 30ºC (86ºF) or 35ºC (95ºF) and overheating of the brakes in track.

However, in central Spain, it is easy for temperatures to drop below 0ºC (32ºF) in winter, and yet I had never read any problems with low temperatures with brake fluid. Very interesting, in any case! Thanks for the information!