Omega - which brake fluid ?

I have to change brake fluid in Omega '96
Which one should it be (DOT - ?)
Shell service nearby uses only and only DOT-4, I have no service history, no labels under the trunk.
JaC

 

It should be stated on the cap of the brake oil tank. Just take a look under
the bonnet...

All in a sudden, 666 erupted with:
| I have to change brake fluid in Omega '96
| Which one should it be (DOT - ?)
| Shell service nearby uses only and only DOT-4, I have no service
| history, no labels under the trunk. JaC

 

Negative, nothing to be found on the cap or tank itself.....
JaC

 

Unless the car requires a proprietry brake fluid (whcih I doubt) then
dot-4 would be the one of choice with dot-3 probably still being
acceptable.

 

One German book says for Omega is Dot 4 or SAE J 1703.
But there are many DOT 4 brake fluids on the market, some of them may harm some parts, especially in older system.
How do you thing about Castrol synthetic DOT 4 brake fluid ?
Any of you use it in your Vauxhall year 1996-97 ?
JaC

being acceptable.

 

Isn't DOT4 a type of standard? Therefore any DOT4 will do.

 

Well, there might be mineral or synthetic DOT 4.
IMHO dot specifies maximum sevice temperature.
But I'm not specialist, so my questions.
JaC