Is low viscosity brake fluid needed for our cars?

[Spetznaaz]

Hello,

I was about to purchase some Pentosin Super Dot 4 then i read in this thread, post #9: https://www.audizine.com/forum/showt...ing-the-brakes that you should use low viscosity brake fluid due to the ABS...

Can anyone tell me if this is correct?

Also, is anyone able to tell me which size tube to put on the bleed nipple - I read 1/4 inch but i went out there and put a 1/2 inch tube on which was only slightly to big to fit tight enough so i feel like 1/4 inch would be way too small. Don't want to start the job only to find i've got to go out and get another tube.

Cheers!

[Jeevan]

Any dot4 brand is compatible. Please don't waste time reading junk online. Follow the manufacturer recommendations.


Sent from my iPhone using Audizine

[Jayz691]

Any dot4 brand is compatible. Please don't waste time reading junk online. Follow the manufacturer recommendations.


Sent from my iPhone using Audizine

Its not junk, lol. LV is for exreme cold conditions. It has a purpose.

Sent from my LM-G710VM using Audizine Forum mobile app

[Theiceman]

He's not saying lv is junk, he is saying what you read online is.

LV gives you longer change interval. Dot 4 was being used in ultra cold decades before there was an LV fluid.

Op just use a high quality dot 4.
I use ate, but there are many available.

Sent from my SM-G973W using Audizine Forum mobile app

[Spetznaaz]

Thanks for the replies guys. So LV only really needed for extreme cold, which we certainly don't have here.

Am i right that Pentosin Super Dot 4 is a high quality brand? https://www.ebay.co.uk/itm/372234651...EAAOSwlN5alV-I

[Theiceman]

Thanks for the replies guys. So LV only really needed for extreme cold, which we certainly don't have here.

Am i right that Pentosin Super Dot 4 is a high quality brand? https://www.ebay.co.uk/itm/372234651...EAAOSwlN5alV-I

oh yes, wont go wrong there.

[Spetznaaz]

Should be here Wednesday :)

Can anyone advise what size tube will fit on the bleed nipples?

[Theiceman]

Should be here Wednesday :)

Can anyone advise what size tube will fit on the bleed nipples?

i just have lot lying around, so not sure , but if its too small i just stretch it with some needle nose pliers. poly tubing is cheap, so just get a couple of feet of different sizes.

be careful with those bleed nipples on the calipers. dont snap one off or you are in a world of hurt.

[Spetznaaz]

i just have lot lying around, so not sure , but if its too small i just stretch it with some needle nose pliers. poly tubing is cheap, so just get a couple of feet of different sizes.

be careful with those bleed nipples on the calipers. dont snap one off or you are in a world of hurt.

I'll just get a selection of tubes and hope for the best. Lol yeah snapping one or stripping one when tightening (no torque specs i can find) is my fear. Knowing Audi i'm guessing you can't just buy a replacement bleeder valve.

[Charles.waite]

Any dot4 brand is compatible. Please don't waste time reading junk online. Follow the manufacturer recommendations.


Sent from my iPhone using Audizine

You do realize that Pentosin low viscosity is the manufacturer recommendation right?

I put Pentosin LV in my b7. I'm not aware of any meaningful difference it will make other than the lower viscosity making it easier to bleed (bubbles will move out more quickly and will less pressure maybe). I'm not certain there is a huge amount of difference between the LV and the non-LV Pentosin tbh, but whatever. I put the LV in because Pentosin's site recommended it for the b7.

[Charles.waite]

I'll just get a selection of tubes and hope for the best. Lol yeah snapping one or stripping one when tightening (no torque specs i can find) is my fear. Knowing Audi i'm guessing you can't just buy a replacement bleeder valve.

Oh you can. Not the end of the world, but if it snaps of in the caliper you're going to be in a fun un-fun position.

I just wish that ATE Super Blue wasn't outlawed because of the color. It made fluid flushes so easy! Just bleed until its all blue instead of yellow or green...

[Theiceman]

I'll just get a selection of tubes and hope for the best. Lol yeah snapping one or stripping one when tightening (no torque specs i can find) is my fear. Knowing Audi i'm guessing you can't just buy a replacement bleeder valve.

you dont torque bleeder nipples, just snug is more then enough. a slight tug with your flair wrench is more than enough ..
the issue is they might be seized in when you come to loosen it.. you should be flushing fluid i would say every 2 -3 years but could go 5 easily. But if you have gone 10 like some do then the nipple has not been loosened and could be seized in.

[Spetznaaz]

Oh you can. Not the end of the world, but if it snaps of in the caliper you're going to be in a fun un-fun position.

I just wish that ATE Super Blue wasn't outlawed because of the color. It made fluid flushes so easy! Just bleed until its all blue instead of yellow or green...

Knowing my luck it will happen but fingers crossed. This will be my first time doing it on this car and 2nd time ever and it's been a while. Yeah i wanted to get the ATE blue stuff then read about how it was outlawed in the U.S and Europe, ridiculous if you ask me.

you dont torque bleeder nipples, just snug is more then enough. a slight tug with your flair wrench is more than enough ..
the issue is they might be seized in when you come to loosen it.. you should be flushing fluid i would say every 2 -3 years but could go 5 easily. But if you have gone 10 like some do then the nipple has not been loosened and could be seized in.

I'm really OCD with torqueing. Way i see it, i can't mess it up with a torque wrench but when it comes to snug to me there's so much variation between one mans idea of snug and another's.

I just had a look at the service record, for some reason i thought it had been done right before i purchased the car 2.5 years ago but apparently it was last changed in 2012. Oops... this isn't good, i dread to think the condition of the caliper pistons.

[Charles.waite]

Knowing my luck it will happen but fingers crossed. This will be my first time doing it on this car and 2nd time ever and it's been a while. Yeah i wanted to get the ATE blue stuff then read about how it was outlawed in the U.S and Europe, ridiculous if you ask me.



I'm really OCD with torqueing. Way i see it, i can't mess it up with a torque wrench but when it comes to snug to me there's so much variation between one mans idea of snug and another's.

I just had a look at the service record, for some reason i thought it had been done right before i purchased the car 2.5 years ago but apparently it was last changed in 2012. Oops... this isn't good, i dread to think the condition of the caliper pistons.

There is an actual torque spec, but its likely really low, like 5-10nm or something. Essentially hand tight, if even that. But yea I agree, with lots of things, one man's "hand tight" is another's "stripped bolt".

[Jeevan]

Oh you can. Not the end of the world, but if it snaps of in the caliper you're going to be in a fun un-fun position.

I just wish that ATE Super Blue wasn't outlawed because of the color. It made fluid flushes so easy! Just bleed until its all blue instead of yellow or green...

Brake fluid cap says dot4 on mine. Nothing mentioned that using LV is mandatory at least on the cap. Apart from that, old trucks and school busses extreme cold weather places like Siberia etc still running dot 3 without any issues. Yes it's a minor upgrade, if you have money to flush thru every 2 years, yes please go for it. I have been using Walmart Prestone dot4 for some years now flushing them every break job. Didn't notice a touch difference. Again a reminder, this is a 180hp saloon with takes about 9-11 secs to get to 60z Aint no Bugati.

[Theiceman]

Brake fluid cap says dot4 on mine. Nothing mentioned that using LV is mandatory at least on the cap. Apart from that, old trucks and school busses extreme cold weather places like Siberia etc still running dot 3 without any issues. Yes it's a minor upgrade, if you have money to flush thru every 2 years, yes please go for it. I have been using Walmart Prestone dot4 for some years now flushing them every break job. Didn't notice a touch difference. Again a reminder, this is a 180hp saloon with takes about 9-11 secs to get to 60z Aint no Bugati.

remind me of my son when he is taking about his jetta

" 0-60 ? ..... yes "

[Charles.waite]

Brake fluid cap says dot4 on mine. Nothing mentioned that using LV is mandatory at least on the cap. Apart from that, old trucks and school busses extreme cold weather places like Siberia etc still running dot 3 without any issues. Yes it's a minor upgrade, if you have money to flush thru every 2 years, yes please go for it. I have been using Walmart Prestone dot4 for some years now flushing them every break job. Didn't notice a touch difference. Again a reminder, this is a 180hp saloon with takes about 9-11 secs to get to 60z Aint no Bugati.

I wasn’t aware the brake fluid cap was the factory manual….

Yea any Dot 4 fluid is compatible but the b7s specify the low viscosity fluid. Again the question wasn’t “is LV fluid the ONLY fluid we can use”.

[Theiceman]

I wasn’t aware the brake fluid cap was the factory manual….

Yea any Dot 4 fluid is compatible but the b7s specify the low viscosity fluid. Again the question wasn’t “is LV fluid the ONLY fluid we can use”.

Lol. That would have to be really small font.
Is there a transmission r and r printed on their too ?

Sent from my SM-G973W using Audizine Forum mobile app

[Jeevan]

I wasn’t aware the brake fluid cap was the factory manual….

Yea any Dot 4 fluid is compatible but the b7s specify the low viscosity fluid. Again the question wasn’t “is LV fluid the ONLY fluid we can use”.

You must the type of guy who reads manuals while putting it in women V's. But yeah, there is nothing wrong in reading manuals for everything.

[Charles.waite]

I’m more the kind of guy who doesn’t have tolerance for idiots who harass the OP while not actually answering the question he asked in any meaningful way.

Not my fault you tend to be that guy more often than not…

[Jeevan]

I’m more the kind of guy who doesn’t have tolerance for idiots who harass the OP while not actually answering the question he asked in any meaningful way.

Not my fault you tend to be that guy more often than not…

Manual also says to lift the car for oil change, did you buy a lift too? Do you know, B7 base model oil change can be done without even jacking up the car?

When the brake fluid cap says dot4, why would you go look in the manual again? I am not saying you are wrong or you shouldnt use LV. Go for it when you have money to blow every couple years unnecessarily for a minor upgrade. There is a reason manufacturers put labels on many things. Yet you have the audacity to call me idiot.

Come back at me after torquing your D and brain to spec according to your manual. Don't bother replying. Don't wanna waste anyone's time anymore on this thread

[Gowking]

Lol the giant douche has spoken everybody…

[Charles.waite]

I have neither the time nor the crayons to explain this all to you.

Some people’s children…

[80sGuy]

My very first time experiencing the blinking red handbrake light on dash with three soft beeps when driving on some congested FWY in L.A.. Checked my brake fluid reservoir and it was almost near the 'low' mark. I needed brake fluid asap so I can drive the thing in a day or two. Bought a 12 oz bottle of Prestone AS800Y DOT 4 Synthetic Brake Fluid for $6.58 with tax. Bottle specs are FMVSS 116 SAE 1703/1704 just like what my owner's manual suggested. Topped off, took her a spin, light gone.

[Theiceman]

I've been putting in ate super blue forever on last can... No issues
But that Prestone looks like a nice alternative for a flush. Cheap too.

Sent from my SM-G973W using Audizine Forum mobile app

[80sGuy]

Yep, the Prestone is perfect. Can also use on my '09 Volvo S40. It was $5.97 but has gone up a bit when I purchased it on 11/12/2022. It'll drop. Great deal indeed and perfect for just topping up. Almost bought this VW/Audi bottle (33fl oz) for $12 but shipping from ECS was a whopping $23!!! Not worth it and way too much just for topping off.

[Jay-Bee]

LV, ESP, Super and Class 6 are all just slightly uprated DOT 4 fluids, has nothing to do with cold weather, it's designed for advanced ABS and traction control systems.

Just figured i'd clear that up since no one did lol.

[Theiceman]

LV, ESP, Super and Class 6 are all just slightly uprated DOT 4 fluids, has nothing to do with cold weather, it's designed for advanced ABS and traction control systems.

Just figured i'd clear that up since no one did lol.

i just read 80s guys post forward, as looking back was just too much drama. , maybe i missed the cold weather stuff, but Canada can you believe is considered a warm weather country ?? lol.. in fact it actually is , when i tell people there are 6 or 7 states north of where me and 70% of all Canadians live they think i'm nuts.

[Jayz691]

LV, ESP, Super and Class 6 are all just slightly uprated DOT 4 fluids, has nothing to do with cold weather, it's designed for advanced ABS and traction control systems.

Just figured i'd clear that up since no one did lol.

Ive always read low viscosity was for cloder temps, but guess maybe not. First time I had to get brake fluid for my car, I search all over for info on the difference, and thats all I could find. I've used both over the years, but always pentosin.

Sent from my LM-G710VM using Audizine Forum mobile app

[Theiceman]

yeah i think if its dot 4...... can you imagine if you used non LV vs LV.. and your brakes exploded .. ? i cant think it would go over well... both would work great for us .

[JayDee03]

I did a full system bleed (including ABS pump, via VCDS), and went with Motul 5.1 non-silicone (5.0 IS silicone, and should be avoided). I stick to German products as much as possible, particularly fluids...

https://www.motul.com/is/en/products...-1-brake-fluid

https://azupim01.motul.com/media/mot...0_20221020.pdf