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Discussion Starter #1
Getting my calipers refurbed installing braided hoses and so will need to replace the fluid. Is it DOT4 or DOT5 for the 147GTA?

Thanks,

Pete
 

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Discussion Starter #3
Thanks! Used to dealing with classic cars and never quite know when to use the 5.1 as I know it's not friendly to older materials.

Pete
 

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Yep NEVER use DOT5.0

A "Class 6 DOT4" is really what most people should be using now. Lower viscosity to work better with ABS/ESP/etc and is backward compatible to normal DOT4

I think the minimum boiling point of DOT5.1 is higher than the minimum of DOT4 but most performance fluids with high boiling points are DOT4
 

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It does not matter much if you are using DOT 4 or DOT 5.1.
What matters more is what type of DOT 4 it is.

The standard boiling temperature of DOT 4 is:
DOT 4 base
dry: 205
wet: 155

And a few of the racing ones are below.
As you can see its more about which brand / type you chose. I alway like the Castrol SRF, but its bloody expensive, at 45 pounds a bottle. Though it lasts a year or more on the track with no problem, (so pay once rather than two three times)

ATE Super blue
dry: 280
wet: 202

Brembo LCF 600+
dry: 316
wet: 203

Motul RBF 600
dry: 311
wet: 216

Endless RF-650
dry: 328
wet: 218

Castrol SRF
dry: 310
wet: 270

CL Racing Brake fluid
dry: 325
wet: 195

Ferodo Superformula
dry: 330
wet:

AP racing Radi-Cal R4
dry: 340
wet: 204

AP racing Radi-Cal R3
dry: 325
wet:

AP racing Radi-Cal R2
dry: 312
wet:

AP Racing AP600
wet: 320
dry: 199

Performance Friction RH665
dry: 325
 
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