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I have been having an overheating/brake fade problem with my rear Grimeca system 11's. The fluid reccomendation is for DOT 3 or DOT 4. Is it OK to use 5.1 fluid? Help??? Also any help with stopping the brake fade issue would be much appreciated........
 

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Santana recomends 5.1 in the Formula disc brakes they use.
I am not sold on this however.

Use 4 ( fresh can ) and you should be good.
I have never felt a difference between 5.1 and 4 in my race car days, where we cooked the brakes every weekend, lost them a couple times and nursed them back to finish the race.

Thorsten

ps. what I am saying is that it might not hurt either, as Formula uses the same brakes usually with dot 4.
 

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pick up some Valvoline SynPower DOT4 from kragen/pepboys for like $4 a bottle, and throw it away after your done with the bleed, openned brake fluid bottles are no good after the first use.

i use synpower in my car and also cannot tell the difference between dot 4 and 5, even at the track. this is the best synthitic brake fluid for the price.
 
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