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#1
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Non-synthetic DOT-5 Brake Fluid
Does anyone know of a company that makes such a product? Thanks.
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein" |
#2
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First, why are you considering DOT 5 brake fluid? This brake fluid is formulated with silicone and is not recommended for use with ABS systems. Also, silicone-based fluids should be mixed with glycol-based fluids....they will coagulate.
I'm not sure what is recommended in the owners manual for your 1991 model, but you may be thinking of DOT 5.1, which is a glycol-based brake fluid (DOT 3 & 4 are also glycol-based), and has superior dry and wet boiling points.
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95 E320 Cabriolet, 159K |
#3
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It's my understanding the DOT-5 synthetic contains silicone; the non-synthetic version does not and is therefore acceptable in ABS systems such as mine.
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein" |
#4
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I agree. I don't see any reason why you can't use the DOT 5.1 fluid in your brake system.
Not to mince words, but I believe both DOT 5 (silicone) and DOT 5.1 (glycol) could be called synthetic. So be careful when ordering, to refer to the DOT number and not refer to it as synthetic or non-synthetic.
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95 E320 Cabriolet, 159K |
#5
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Searching the WEB, I found 2 companies thus far who make a 5.1.
Motul and Wagner. The term "severe service" appears on the Wagner product, but neither indicates a silicone base.
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein" |
#6
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What about SynPower by valvoline?
It advertises " Maximizes ABS performance, Exceeds DOT 3 & DOT 4", "Mixes with conventional brake fluids".
It contains "a complex mixtures of glycol ethers, polyglycols and inhibitors"
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J.H. '86 300E |
#7
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Here's a link to a respected automotive website with an article on brake fluid. It may clear up some confusion.
Brake Fluid
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95 E320 Cabriolet, 159K |
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