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Brake fluid
As I am changing the slave and master cylinders, I am also bleeding the system. Any recommendations for brake fluid? Am I better off going with a high temperature, racing-style fluid, or like the regular Castrol GT LMA (on the shelf in most car stores) I have been using.
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I use the Castrol LMA; I've yet managed to get it to boil or burn.;)
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I like LMA because these cars sit a lot. Also because I've used it before and had good results. ATE super blue is also excellent for track use.
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Same old Castrol
I have been using the GT LMA too. But when I went to the local car store yesterday, they only had Castrol marked synthetic brake fluid. So I went to another store and the story was the same. Also, the staff in either store was not able to tell me whether the synthetic fluid is compatible with the regular Castrol brake fluid, so I contacted Castrol and got this answer:
"Castrol GTLMA now has a higher wet boiling point and the product label has been changed. The product formula has not been changed; Castrol GTLMA has always been a fully synthetic brake fluid. The wet boiling point has increased from 311°F to 329°F (155°C to 169°C) Castrol Consumer Relations" The conclusion seems to be that it is the same stuff under a new label. :) |
If you change to a synthetic, make sure you completely,... drain the old fluid out, as they do not mix well.
Since I/we, don't drive our cars regularly, I suck out the master cylinder fluid and add fresh before winter. Water/humidity is the worst enemy in braking systems. I try to use all the fluid from the can because once opened, moisture sets in. If I only use half of it in my cobra, I'll add the rest in my other cars. |
"Synthetic" v. DOT 5
Don't get the term "synthetic" mixed up with DOT 5 fluids (which most of us should not be using). Castrol GT LMA is DOT 3/4, and it's synthetic, and it is fully mixable with conventional brake fluids. Here's the product data sheet on it and it addresses that issue: http://www.castrol.com/liveassets/bp...BrakeFluid.pdf
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I stand corrected. I do recommend the maintenance though.
Thank you. |
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