brake fluid change chat and discussion

[949]

so summer is coming up and i plan on doing some more maintenance on the s3 2015.

not sure if there are any huge differences of note for year and model specific on brake fluid maintenance.

i have changed mine out before with the usual pentosin dot 4 from o'reilly. it works. nothing wrong with it. no issues or anything out of the ordinary.

this time tho I was considering motul for this car.
(just for fun and experience).
as I did some preliminary research on them, they seem to have a lot more versions then the pentosin. now this can be fun or it can be a headache.
I'm no chemical engineer so I would like to see if user experience along with maybe some good insight might shed some light on this from you all.

motul has a few I saw right up front that I thought would work on a daily driven car.
-motul rbf 600
-motul rbf 660
-motul rbf 700
-motul dot 4lv

not looking for anything into the dot 5's. too short of maintenance requirements.

no track but hard braking and also lots of anticipated California heat waves with stop and go traffic.
not looking for items that would damage the system nor have huge maintenance requirements. my usual maintenance on brakes is probably 1.0 years to 2.0 years max. (I know its pretty long but life happens. ehhhhh)

what is your experience and what are your thoughts on motul and which versions would be good for daily driving and occasional spirited braking?

[MikTip]

so summer is coming up and i plan on doing some more maintenance on the s3 2015.
not sure if there are any huge differences of note for year and model specific on brake fluid maintenance.
i have changed mine out before with the usual pentosin dot 4 from o'reilly. it works. nothing wrong with it. no issues or anything out of the ordinary.
this time tho I was considering motul for this car.
(just for fun and experience).
as I did some preliminary research on them, they seem to have a lot more versions then the pentosin. now this can be fun or it can be a headache.
I'm no chemical engineer so I would like to see if user experience along with maybe some good insight might shed some light on this from you all.

motul has a few I saw right up front that I thought would work on a daily driven car.
-motul rbf 600-motul rbf 660-motul rbf 700-motul dot 4lv
not looking for anything into the dot 5's. too short of maintenance requirements.
no track but hard braking and also lots of anticipated California heat waves with stop and go traffic.
not looking for items that would damage the system nor have huge maintenance requirements. my usual maintenance on brakes is probably 1.0 years to 2.0 years max. (I know its pretty long but life happens. ehhhhh)
what is your experience and what are your thoughts on motul and which versions would be good for daily driving and occasional spirited braking?

The 2015 Audi S3 Maintenance Schedule can be google searched and downloaded:

https://static.nhtsa.gov/odi/tsbs/20...28249-9999.pdf

States clearly: Brake Fluid – replace every 2 years regardless of mileage So now everyone knows and guessing is out! !

Stock brakes need only stock brake fluid.

Stock brakes need only stock brake fluid.

I have Neuspeed 6 piston 370mm brakes...larger rear rotors...stock rear calipers.



I run stock brake fluid. Why? Cause I dont "track" my car! Heat is totally not an issue street driving!

Never had any issues with the stock brake fluid.

I have used theses brakes... as you say "spirited" and zero issues with brake fluid. Pads yes...fluid no!

So in my opinion, on a "stock" S3 with "stock" brakes and "street" driving....Motul is not needed.

[949]

The 2015 Audi S3 Maintenance Schedule can be google searched and downloaded:

https://static.nhtsa.gov/odi/tsbs/20...28249-9999.pdf

States clearly: Brake Fluid – replace every 2 years regardless of mileage So now everyone knows and guessing is out! !

Stock brakes need only stock brake fluid.

Stock brakes need only stock brake fluid.

I have Neuspeed 6 piston 370mm brakes...larger rear rotors...stock rear calipers.



I run stock brake fluid. Why? Cause I dont "track" my car! Heat is totally not an issue street driving!

Never had any issues with the stock brake fluid.

I have used theses brakes... as you say "spirited" and zero issues with brake fluid. Pads yes...fluid no!

So in my opinion, on a "stock" S3 with "stock" brakes and "street" driving....Motul is not needed.

hows the initial bite on those?

[MikTip]

hows the initial bite on those?

Varies depending on pad selection...

Currently for street driving I have Hawk HPS Ferro-carbon pads.

I went thru the line of Isweep pads Neuspeed offers and arrived at the Hawk pads.

The larger rear rotors balance out the brakes considerably.

Overall these brakes with good tires can reduce the cars speed amazingly fast.

[949]

Varies depending on pad selection...

Currently for street driving I have Hawk HPS Ferro-carbon pads.

I went thru the line of Isweep pads Neuspeed offers and arrived at the Hawk pads.

The larger rear rotors balance out the brakes considerably.

Overall these brakes with good tires can reduce the cars speed amazingly fast.

nice.
i am on the neuspeed isweep pads. not bad of a set for street and spirited stopping. i feel confident on them. as they are predictable. as i get heat into them they grip better. what i did notice is that they grip great after a car wash with a good spray of high-pressure water into the brakes. as it cleans them out from old pad debris it grips really well again. never seen other brands do that but a good clean seems to rejuvenate the pads grip every time.

i was thinking later to upgrade the calipers to the full set on the rears and fronts. saving up for that. im also not sure how large i should go with. there are 2 sizes for the front and one for the rear.
Front

Front
6-Piston
355x32mm
2-Piece
Front
6-Piston
380x32mm
2-Piece
Rear*
4-Piston
350x29mm
2-Piece

[kevin#34]

the higher the boiling point of the oil, the higher the vapour-lock resistance, but also the higher the hygroscopicity (and thus the oil durability/longevity).
for spirited road drives&occasional track visits, I think that among those proposed the RBF 660 is a good compromise between performance and durability, with change within 18 months at the latest (or even earlier if the water percentage exceeds 2/3%, by now testers to measure the presence of water in the brake circuit cost a few dollars and are fairly reliable), otherwise if you want something even more performing, RBF 700 with change every 12 months at the latest. Alternatives such as Castrol SRF or Endless I would only consider them for heavy track use

so summer is coming up and i plan on doing some more maintenance on the s3 2015.

not sure if there are any huge differences of note for year and model specific on brake fluid maintenance.

i have changed mine out before with the usual pentosin dot 4 from o'reilly. it works. nothing wrong with it. no issues or anything out of the ordinary.

this time tho I was considering motul for this car.
(just for fun and experience).
as I did some preliminary research on them, they seem to have a lot more versions then the pentosin. now this can be fun or it can be a headache.
I'm no chemical engineer so I would like to see if user experience along with maybe some good insight might shed some light on this from you all.

motul has a few I saw right up front that I thought would work on a daily driven car.
-motul rbf 600
-motul rbf 660
-motul rbf 700
-motul dot 4lv

not looking for anything into the dot 5's. too short of maintenance requirements.

no track but hard braking and also lots of anticipated California heat waves with stop and go traffic.
not looking for items that would damage the system nor have huge maintenance requirements. my usual maintenance on brakes is probably 1.0 years to 2.0 years max. (I know its pretty long but life happens. ehhhhh)

what is your experience and what are your thoughts on motul and which versions would be good for daily driving and occasional spirited braking?