13 replies to this topic

[snoopstah]

Car's going in for a service tomorrow, and I asked them to change the brake fluid as well. Obviously I could not supply any and they'll use the bog standard Vauxhall stuff, but there must be better stuff than that. I've seen a few references to Castrol SRX - is that the best I'm going to be able to get at short notice (i.e. from Halfords)? Also, how much do I need?

[mcbunny]

id say super dot 4 do 5.1 is a waste of time unless you are going to bleed it every week and use you car on track every week

[ShinyAndy]

id say super dot 4

do 5.1 is a waste of time unless you are going to bleed it every week and use you car on track every week

Halfords dot5.1 is ideal for fast road/light track use, as is Vauxhalls own stuff

Castrol SRF is a) very expensive, B ) even though its the best you can get, it doesn't seem to be able to cope with our crap brake setup with hard track use

Edited by ShinyAndy, 31 May 2006 - 08:57 AM.

[mcbunny]

id say super dot 4 was better for road and occasional track use

[mcbunny]

Castrol Response Super DOT 4 has been specifically designed to be a high temperature alternative to DOT 5.1 fluids. Its superior characteristics give added benefit in situations where extreme conditions are encountered and ultimate braking response required. Castrol Response Super DOT 4 is based on glycol ether and borate ester technology and as such has a high vapour lock point (measurement relating to high temperature performance under braking conditions). Because of the nature of this formulation, the vapour lock point can be sustained at a higher level than conventional glycol ether based fluids during the service life of the product . PERFORMANCE SAE J1703 (Current) ISO 4925 FMVSS 116 DOT 3 & DOT 4 JIS K 2233 TYPICAL CHARACTERISTICS Dry Boiling Point ºC 280 Wet Boiling Point ºC ca 190 Viscosity at -40ºC, cSt 1200 Viscosity at 100ºC 2.6 pH 7.2 ap dot 5.1 their 551 fluid Typical’ New Dry Boiling Point - 275°C (527°F) Minimum ‘Wet’ E.R. (Equilibrium Reflux) Boiling Point - 150°C (302°F) as you can see both dry and wet boiling points are higher than 5.1 fluid

[snoopstah]

Thanks guys. So how much do I need? A litre? More?

[ShinyAndy]

They should be able to do it with a litre Do you do many trackdays ?

[snoopstah]

Not compared to the amount of road miles I do (around 15,000 per year). A couple of track days a year, give or take.

[tim king]

id say super dot 4

do 5.1 is a waste of time unless you are going to bleed it every week and use you car on track every week

Halfords dot5.1 is ideal for fast road/light track use, as is Vauxhalls own stuff

Castrol SRF is a) very expensive, B ) even though its the best you can get, it doesn't seem to be able to cope with our crap brake setup with hard track use

been to halfords they weren't sure but said dot 4

[snoopstah]

Car's going in for a service tomorrow

been to halfords they weren't sure but said dot 4

I said my car was going in for a service tomorrow, not in 55 months.

[RobNA]

been to halfords they weren't sure but said dot 4

Thanks for the info Tim

[MaDFreeBiRD]

well that was an interesting bump

[tim king]

been to halfords they weren't sure but said dot 4

Thanks for the info Tim

is dot 4 ok then ????

[RobNA]

been to halfords they weren't sure but said dot 4

Thanks for the info Tim

is dot 4 ok then ????

Better than ok, its WONDERFUL Tim