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#1
01-27-2009, 08:16 PM
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Castrol GTLMA Dot 3/4 (synthetic) compatibility
Recently put on new calipers in the front. When bleeding, only the rear chamber of the brake fluid reservoir diminished. I filled with this Castrol Product in the rear chamber only and did NOT flush the rear brakes.
Are there any compatibility issues with regular DOT4? 
Last edited by jt20; 01-27-2009 at 08:22 PM. 
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#2
01-27-2009, 08:34 PM
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dont use synthetic fluid.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#4
01-27-2009, 08:37 PM
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I have used Valvoline synthetic without any problems. Not that i boil my brake fluid but it has a higher boiling point than Dot 4. It is not to be confused with Dot5 fluid though (silicone).
__________________
1985 CA 300D Turbo , 213K mi
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#7
01-27-2009, 08:54 PM
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Silicone fluid (DOT 5) is synthetic, but that does not mean that all synthetics are silicone. Never use DOT 5 in any DOT 3/4 application. I've seen motorcycle brakes that call for DOT 5, but never on a car.
GT-LMA has been on the market for decades (and I've used it in many cars), but I do not recall seeing "synthetic" on the label. What's "natural" about DOT 3/4 anyway?
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#9
01-27-2009, 09:08 PM
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well.. it has glycol in the name.. but certainly not natural sounding.
from Trickapedia: Mineral-based * Alkyl ester * Aliphatic amine * Diethylene glycol * Diethylene glycol monoethyl ether * Diethylene glycol monomethyl ether * Dimethyl dipropylene glycol * Polyethylene glycol monobutyl ether * Polyethylene glycol monomethyl ether * Polyethylene oxide * Triethylene glycol monobutyl ether * Triethylene glycol monoethyl ether * Triethylene glycol monomethyl ether
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