Goodridge lines

Post by **Nikku** » December 12, 2007

well as its a synthetic fluid and your system is not designed for such fluid, typically it wears down the seals faster. the lines shouldnt be harmed, you can always take that stuff out and replace it with DOT 5.1, as 5.1 is non synthetic.

TURBevO8 · Post by **TURBevO8** » December 13, 2007

Nikku wrote:well as its a synthetic fluid and your system is not designed for such fluid, typically it wears down the seals faster. the lines shouldnt be harmed, you can always take that stuff out and replace it with DOT 5.1, as 5.1 is non synthetic.

yeah. it wont be in there forever. Gonna let it in there a while though. I will have to read up on this some more before I do anything. I just dropped like $45 on the fluid too so it would suck to drain it out already. I am sure it will be fine for a year or so no matter what. Thanks for the heads up though.

Post by **Nikku** » December 14, 2007

no prob.

TURBevO8 · Post by **TURBevO8** » December 15, 2007

So this is what I got. It says DOT 4 and "factory line". What does the 4 mean compared to 5.1? Is that the weight of the oil like 5W30 vs 10W30 or something? Also why would it say factory line if it is not good for factory lines? Forgive my ingorance on this subject.

Post by **Nikku** » December 15, 2007

the DOT rating implies the boiling point of the product. With the exception of the RBF600 (its specially designed to have a higher boiling point then normal DOT 5 fluids), the higher DOT rating would mean the fluid boils later, boiling fluid of course contributes to brake fade. As for "factory line" you have to remember that MOTUL comes from another country and it could just be bad translation, I checked the site and this is what it had to say about RBF600.

"100% synthetic, RBF 600 FACTORY LINE is a polyglycol-based brake fluid exclusively designed for races. Developed to resist high temperatures and wet-weather conditions, RBF 600 has a high dry boiling point of 312°C and a wet boiling point of 216°C. This ensures effective braking under extreme racing or rainy conditions. Couple this with its outstanding anti-vapor lock performance, RBF 600 has become a well-trusted brake fluid in many races."

And as for my comment earlier about synthetic fluids, I was a little off, synthetic is OK if the fluid is not silicon based. Sorry for the mix up

.

hondamnit · Post by **hondamnit** » December 15, 2007

you had me scared... i run motul in my car lol buying a ABS pump would not be fun

Post by **Nikku** » December 16, 2007

RBF600 is bad for the brake system, its not designed for ABS systems for one, and it is a silicon based fluid.

TURBevO8 · Post by **TURBevO8** » December 16, 2007

Nikku wrote:RBF600 is bad for the brake system, its not designed for ABS systems for one, and it is a silicon based fluid.

Yeah I am going to have to read up on this more. I did read the Motul is not so practical for street cars because it is expensive and needs to be changed about once a year for street and more if you race. But I took a look in my owners manual here and it says to use DOT 3 or DOT 4 fluid only. The RBF600 is DOT 4 so at least I am good on that. So I guess I am not to use DOT 5.1.

It also says "do not let any petroleum based fluid touch, mix with, or get into the brake fluid. This will damage the seals."

I'll have to read up on this more though...

Post by **Nikku** » December 17, 2007

well it says DOT 3 or DOT 4 only because of the ABS system in the car, motul DOT 5.1 is designed to work with ABS systems.

. RBF600 was designed more for motorcycles in mind.

TURBevO8 · Post by **TURBevO8** » December 17, 2007

I think I'll be fine. I have to change the fluid out in a year anyway so I will do that and just go back to the stock Mitsu stuff. I dont race it anyway...