workhurts

You folks using the low viscosity stuff or the regular?

Not sure what oem fluid is. Pelican has regular viscosity listed as the oem equivalent.

slicky rick

Had this issue before, no significant inputs i received. I moved to sl.6 and initially i felt there was improved feel. Maybe it was psychological but i did not feel any downside. My psychological inputs would be better feel and easier feedback on the brakes when abs is activated. I feel this not on hard stops but rather when one of the wheels loose traction while braking going upmamd down parking buildings...one tire looses traction and the abs gets activated. The low viscosity is a character of the sl.6 when cold. In normal temps i think it reverts to similar viscosity as the normal ones....logical thinking says there could be benefit. And with the better or equal boiling temps of the oem pentosin dot 4, how can you go wrong.....

slicky rick

Im starting to have longer responses here.....am i transforming into macster?! Hahahah

Falcondrivr

Castrol SRF. Just go with the best and be done with it.

Dennis C

I switched to Prospeed RS683 and it made a noticeable difference in brake pedal feel.

www.rs683.com

workhurts

I was under the impression that the 'better' the fluid in terms of boiling point and track type performance the more often it needs changing.

I don't need track type protection.

I know for example the VW specs low visc. BMW on cars with DSC spec either low visc or normal depending on whether there a pre-charge pump. I just can't find what Porsche states for the 997.2 other than dot4.

Part of the reason for this Is have the 911, 2 BMWs and a VW and would really like to throw the same stuff in all 4.

slicky rick

I would suggest it. Though of course im just your common diy car guy driving a porsche. If your tracking your car though, i would go with possibly motul rbf, otherwise the synthetic ones or even the 5.1 might be overkill.
Except for th synthetic like castrol, i think i would agree with you, higher boiling point fluids usually require more frequent changes.