Notices
991
Sponsored by:

Motul 660 vs Castrol SRF

 
Old 05-14-2019, 02:47 PM
  #1  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default Motul 660 vs Castrol SRF

FCP Euro is backordered on Castrol SRF...went with 660 in the meantime until SRF is back in stock...The first day I took out the 991.1 C2S, the OEM fluid got cooked. From what I am reading, the 660 takes on moisture more quickly and needs to be changed more frequently. Just wanted to get other members' experience.
Tampa991 is offline  
Old 05-14-2019, 03:30 PM
  #2  
luv2sleep
User
 
luv2sleep's Avatar
 
Join Date: Oct 2016
Location: SoCal
Posts: 344
Default

I have no experience with either but you can get Castrol SRF for $68 shipped on Amazon.
luv2sleep is online now  
Old 05-14-2019, 03:43 PM
  #3  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default

Yes, it is available from other avenues...I prefer using FCP Euro as their parts replacements are free after the first purchase.
Tampa991 is offline  
Old 05-14-2019, 08:19 PM
  #4  
Tay101
User
 
Join Date: Oct 2011
Location: San Diego
Posts: 124
Default

Castrol SRF hands down.

If you want the very best then go with Endless RF650.
Tay101 is offline  
Old 05-14-2019, 09:52 PM
  #5  
pfbz
Addict
Rennlist Member
 
pfbz's Avatar
 
Join Date: Jul 2012
Location: US
Posts: 3,516
Default

Originally Posted by Tampa991 View Post
Yes, it is available from other avenues...I prefer using FCP Euro as their parts replacements are free after the first purchase.
It would be pretty generous of them to "replace" SRF... Maybe that's not what you meant, but if not, just use amazon.

From what I am reading, the 660 takes on moisture more quickly and needs to be changed more frequently. Just wanted to get other members' experience.
All brake fluids absorb moisture. I can't say wether Motul 660 absorbs it any faster, but I can say that SRF has much less drop in the boiling points between wet and dry than the Motul, which is what makes it a great fluid for street/track cars. Even when "wet" (absorbed some % of moisture), it still has a sufficiently high boiling point to be usable on track days.
pfbz is offline  
Old 05-14-2019, 10:42 PM
  #6  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default

Buy it once and you won’t have to pay for the second round. Are you familiar with their lifetime replacement? I use it for brakes and oil changes. I stopped paying for replacement parts (after the first purchase) years ago.
Tampa991 is offline  
Old 05-14-2019, 11:42 PM
  #7  
pfbz
Addict
Rennlist Member
 
pfbz's Avatar
 
Join Date: Jul 2012
Location: US
Posts: 3,516
Default

yes, of course... just not sure what that has to do with buying brake fluid that they don't have in stock.
pfbz is offline  
Old 05-14-2019, 11:44 PM
  #8  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default

All I was asking was anyone’s experience with Motul 660 vs SRF since I will be using it until the SRF goes back into stock there. There is still a credit applied when the return for the new product is made.
Tampa991 is offline  
Old 05-14-2019, 11:46 PM
  #9  
pfbz
Addict
Rennlist Member
 
pfbz's Avatar
 
Join Date: Jul 2012
Location: US
Posts: 3,516
Default

wow... OK, best of luck.
pfbz is offline  
Old 05-15-2019, 03:27 AM
  #10  
spdracerut
User
 
Join Date: Feb 2016
Posts: 449
Default

Motul rbf 600 and 660 work well, but require relatively frequent changes. Castrol srf definitely lasts longer.
spdracerut is offline  
Old 05-15-2019, 10:24 AM
  #11  
LargePuppy
Addict
Rennlist Member
 
LargePuppy's Avatar
 
Join Date: Mar 2019
Location: Central NJ
Posts: 84
Default

Do you rebottle the fluids and ship it back to them? Curious

Originally Posted by Tampa991 View Post
Buy it once and you won’t have to pay for the second round. Are you familiar with their lifetime replacement? I use it for brakes and oil changes. I stopped paying for replacement parts (after the first purchase) years ago.
LargePuppy is online now  
Old 05-15-2019, 10:32 AM
  #12  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default

Originally Posted by LargePuppy View Post
Do you rebottle the fluids and ship it back to them? Curious
Correct. Dump old fluids in the new empty bottles. I use USPS flat rate boxes to cut the cost on shipping back...great for all fluids (engine oil, trans, brake, diff), filters, wipers, and brakes.
Tampa991 is offline  
Old 05-15-2019, 10:56 AM
  #13  
991carreradriver
Addict
Rennlist Member
 
991carreradriver's Avatar
 
Join Date: Sep 2014
Location: Northeast
Posts: 1,491
Default

I used Motul 660 for a couple of years and thought it was great until I started using the SRF. I found two differences that made a difference. First it lasts longer, second I found better modulation of the brakes. For me the cost is not a material factor as I found I used 2x as much 660 in one track season as opposed to the SRF.
991carreradriver is offline  
Old 05-15-2019, 11:02 AM
  #14  
Tampa991
Addict
Rennlist Member
Thread Starter
 
Tampa991's Avatar
 
Join Date: Jul 2014
Location: Tampa FL
Posts: 190
Default

Originally Posted by 991carreradriver View Post
I used Motul 660 for a couple of years and thought it was great until I started using the SRF. I found two differences that made a difference. First it lasts longer, second I found better modulation of the brakes. For me the cost is not a material factor as I found I used 2x as much 660 in one track season as opposed to the SRF.
Sounds good..will be switching to SRF...switch to FCP Euro and you will only have to pay for SRF one more time for as long as you track.
Tampa991 is offline  
Old 05-15-2019, 08:18 PM
  #15  
pfbz
Addict
Rennlist Member
 
pfbz's Avatar
 
Join Date: Jul 2012
Location: US
Posts: 3,516
Default

So you send back all your used motor oil as well?

Wow, IMHO that's just wrong. Kind of like the ladies I see returning dead Christmas poinsettias to Costco in March. But I'm glad you found a loophole that saves you a few bucks...
pfbz is offline  

Thread Tools
Search this Thread

Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: