I'm going to be changing my '89 420SEL's brake fluid in the next few weeks and am curious as to whether it makes much difference which DOT4-rated fluid I use. I picked-up a quart of Valvoline's SynPower fluid at the local AutoZone last weekend, but thought I'd check with you guys before I used it...

(I understand that dry and wet boiling points vary from brand to brand, but am I correct in assuming that as long as the product meets the DOT4 standard, it'll do the trick--assuming typical local and highway driving?)

Thanks, as always, for sharing any insights.

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Eric

1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)

I have used the Valvoline product in my brake systems for a couple of years now and have had no problems with it. I have had problems with their power steering fluid in my truck.

Hi Goldstone,

I have used it recently based on a rec. here on the board. Somebody gave the boilling points and prices and this was the best compromise. You might find it with a search. I might have read it on the performance board. Sorry that I can't give better credit to the lister who deserves it.

I picked up 2 quarts but you probably get by with 1.

Good luck

Reinhard Kreutzer

Yeah, i've used that before and i think it is good stuff. If my memory serves me correct, I believe it exceeds the DOT 4 standards for wet and dry boiling points.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record

ANYBODYS DOT-4 IS JUST FINE. CASTROL & PRESTONE ARE READILY AVAILABLE.

DO NOT BUY INTO THE BS THAT IT HAS TO BE MADE IN GERMANY.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"